TY - BOOK ID - 146002450 TI - Manual of instructions for the survey of the mineral lands of the united states PY - 1909 PB - Washington : U.S. Government printing office, DB - UniCat KW - Topographic surveys KW - Land surveys KW - Observation UR - https://www.unicat.be/uniCat?func=search&query=sysid:146002450 AB - ER -