State coordinates and polyconic maps.  Some notes on the state plane-coordinate systems and their relation to polyconic quadrangle maps. 
Prepared by Topographic Division, Research and Technical Control Branch. 
 - Washington,  1949. 
 - 7 p.  illus.  27 cm. 
 - Geological Survey circular  no. 57 .
<br/><br/> Cover title. 
<br/><br/><label>LCCN: </label>gs 49000232  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Map projection.<br/>Cartography.
<br/><br/><label>LC Class. No.: </label>QE75  / .C5 n. 57