TY  - BOOK
TI  - Instructions to the Surveyors General of Public Lands of The United States for those surveying districts established in and since the year 1850: : containing, also, a Manual of instructions to regulate the field operations of Deputy Surveyors : illustrated by diagrams
PY  - 1871///
CY  - Washington : 
PB  - Government Printing Office, 
ER  -