The civil space program of the U.S. has been one of the most significant activities of the latter half of the 20th century. This is the third volume of a multi-volume series containing a selection of key documents in the history of the U.S. civil space program. Dealing with organizational developments, the documents in Vol. III are arranged by theme, with an introductory essay for each theme by scholars in the field: The History of Satellite Communications; Observing the Earth From Space; & Space as an Investment in Economic Growth. Also includes a Biographical Appendix & Index.Logsdon, John M. is the author of 'Exploring the Unknown Vol. 3 : Selected Documents in the History of the U. S. Civil Space Program: Using Space', published 2003 under ISBN 9780756736316 and ISBN 0756736315.