Wesley Parks
págs. 91-92
The American Congress on Surveying and Mapping, Inc., and ACSM's Involvement with FIG
Curt Sumner, John Fenn, John Hohol
págs. 93-94
pág. 95
The American Association for Geodetic Surveying: Its Continuing Role in Shaping the Profession
Wendy Lathrop, Daniel Martin
págs. 97-99
The Future Role of Geodetic Datums in Control Surveying in the United States
David R. Doyle, Dru A. Smith
págs. 101-106
págs. 107-110
National Society of Professional Surveyors
Rita Lumos, Robert E. Dahn
págs. 111-114
Cadastral Survey Activities in the United States
Donald A. Buhler
págs. 115-118
The Geographic and Land Information Society and GIS/LIS Activities in the United States
Joshua S. Greenfeld
págs. 119-122
págs. 123-126
What Does Height Really Mean? Part I: Introduction
Thomas H. Meyer, Daniel R. Roman, David B. Zilkoski
págs. 127-137
What Does Height Really Mean? Part II: Physics and Gravity
Thomas H. Meyer, David B. Zilkoski, Daniel R. Roman
págs. 139-148
What Does Height Really Mean? Part III: Height Systems
Daniel R. Roman, David B. Zilkoski, Thomas H. Meyer
págs. 149-160
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