81![Energy / Physical universe / Renewable energy / Heating / ventilating / and air conditioning / Sustainability / Solar thermal energy / Energy conversion / Sustainable building / Solar water heating / Water heating / Stagnation temperature / Hot water storage tank Energy / Physical universe / Renewable energy / Heating / ventilating / and air conditioning / Sustainability / Solar thermal energy / Energy conversion / Sustainable building / Solar water heating / Water heating / Stagnation temperature / Hot water storage tank](/pdf-icon.png) | Add to Reading ListSource URL: www.heliodyne.comLanguage: English - Date: 2016-07-05 09:42:44
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82![Collecting / Museology / Antique / Collectors / Map / Humanities / Culture / Auction Collecting / Museology / Antique / Collectors / Map / Humanities / Culture / Auction](/pdf-icon.png) | Add to Reading ListSource URL: www.oldworldauctions.comLanguage: English - Date: 2015-11-10 16:47:30
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83![Software / World Wide Web / Computing / Internet marketing / Display advertising / Railroadiana / Facebook / Advertising Software / World Wide Web / Computing / Internet marketing / Display advertising / Railroadiana / Facebook / Advertising](/pdf-icon.png) | Add to Reading ListSource URL: www.klnl.orgLanguage: English - Date: 2014-07-20 11:27:45
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84![Kites / Recreation / Visual arts / Kite / Leisure / Beach / Bracklesham Bay / Power kite Kites / Recreation / Visual arts / Kite / Leisure / Beach / Bracklesham Bay / Power kite](/pdf-icon.png) | Add to Reading ListSource URL: geologistsassociation.org.ukLanguage: English - Date: 2015-05-14 04:54:48
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85![Telephony / Technology / Ericsson / Ericofon / Bell System / Telephone / Trimline telephone / Rotary dial / Phreaking / Ringtone / Mobile phone / Pulse dialing Telephony / Technology / Ericsson / Ericofon / Bell System / Telephone / Trimline telephone / Rotary dial / Phreaking / Ringtone / Mobile phone / Pulse dialing](/pdf-icon.png) | Add to Reading ListSource URL: www.telephonecollectors.orgLanguage: English - Date: 2013-07-15 17:38:39
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86![Sheffield Galleries and Museums Trust / Sheffield / Yorkshire / Graves Art Gallery / Contemporary art / Millennium Gallery / Weston Park Museum / John George Graves / Conceptual art / Art museum / Museum / Site Gallery Sheffield Galleries and Museums Trust / Sheffield / Yorkshire / Graves Art Gallery / Contemporary art / Millennium Gallery / Weston Park Museum / John George Graves / Conceptual art / Art museum / Museum / Site Gallery](/pdf-icon.png) | Add to Reading ListSource URL: www.museums-sheffield.org.ukLanguage: English - Date: 2016-07-07 11:40:46
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87![Geology / Economic geology / Pegmatite / Mineral collecting / Fluorite Geology / Economic geology / Pegmatite / Mineral collecting / Fluorite](/pdf-icon.png) | Add to Reading ListSource URL: www.mindatnh.orgLanguage: English - Date: 2013-08-02 19:12:45
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88![Toy trains / Rail transport modelling / Train Collectors Association / Pennsylvania / Strasburg / Pennsylvania / Lego Trains / Colorado Railroad Museum / Toy Toy trains / Rail transport modelling / Train Collectors Association / Pennsylvania / Strasburg / Pennsylvania / Lego Trains / Colorado Railroad Museum / Toy](/pdf-icon.png) | Add to Reading ListSource URL: www.tcamembers.orgLanguage: English - Date: 2013-07-18 09:01:24
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89![Numismatics / Currency / Economy / Coins / Coin collecting / Collecting / Exonumia / Coin / United States dollar / William Wood / Mint / Mint mark Numismatics / Currency / Economy / Coins / Coin collecting / Collecting / Exonumia / Coin / United States dollar / William Wood / Mint / Mint mark](/pdf-icon.png) | Add to Reading ListSource URL: colonialcoins.orgLanguage: English - Date: 2015-12-22 21:18:07
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90![Canadian law / Gun laws in Canada / Gun laws in Australia Canadian law / Gun laws in Canada / Gun laws in Australia](/pdf-icon.png) | Add to Reading ListSource URL: davidshoebridge.org.auLanguage: English - Date: 2016-04-07 03:33:37
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