Nichols, Herbert L. 1908- Modern Techniques Of Excavation / by Herbert L. Nichols ; illustrations by Helen Schwagerman - London : Odhams Press Limited , 1956 - xv, various paging .: table, illustrations .; 24 cm "Shortened and revised version of Moving the earth." Includes bibliographical references and indexs ISBN: Subjects--Topical Terms: Excavating machinery Dewey Class. No.: 624.152 / NIC 1956