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. 

 - Washington :   Government Printing Office,   1871. 
 - 70 p., [3] h. gráf. pleg. ;   23 cm.