![](https://www.pdfsearch.io/img/40a5cfeacb1d4617e1bc696880f6ba6a.jpg)
| Document Date: 2013-06-25 15:19:33 Open Document File Size: 46,18 KBShare Result on Facebook
City Toronto / / Company University of Toronto Press / / Organization Royal Astronomical Society of Canada / University of Toronto / / Person Fred Espenak / / |