Pick, Milos. <br/><br/>
Theory of the earth's gravity field / 
Milos Pick, Jan Picha [and] Vincenc Vyskocil. 
 - Amsterdam :  Elsevier Scientific,  1973. 
 - 538 p. : ill. 
<br/><br/><label>ISBN: </label>0444409394 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gravitational fields.<br/>Gravity.