TY - BOOK ID - 134499584 TI - Spirit leveling in Michigan, 1896-1938 AU - Staack, J. G. AU - Geological Survey (U.S.) PY - 1941 PB - [Washington, D.C.] : Washington : United States Department of the Interior, Geological Survey, United States Government Printing Office. DB - UniCat KW - Leveling KW - Bench-marks KW - Michigan KW - Michigan. KW - Altitudes. UR - https://www.unicat.be/uniCat?func=search&query=sysid:134499584 AB - ER -