Tables of X and Y  elliptic rectangular co-ordinates 
Pretoria Government                                          
 - Pretoria  Government Printing and Stationery Office  1927 
 - 60p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus<br/>Tables
<br/><br/><label>Universal Decimal Class. No.: </label>52(083)  / PRE