differential levelling equipment / survey control mark network / steel / /
Organization
Intergovernmental Committee on Surveying and Mapping Table / Joint Committee for Guides / Intergovernmental Committee on Surveying / Intergovernmental Committee on Surveying and Mapping / Intergovernmental Committee on Surveying and Mapping Guideline for Control Surveys / Geodesy ICSM Permanent Committee on Geodesy / Permanent Committee on Geodesy / Intergovernmental Committee on Surveying and Mapping Terms / ICSM Permanent Committee / /