Ritchie, W <br/><br/>
Mapping for field scientists:   A problem solving approach 

 - London:   David & Charles Publishers ltd,   1977 
 - 327p. 
<br/><br/><label>ISBN: </label>0-7153-7272-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mapping
<br/><br/><label>Subjects--Index Terms: </label>Cartographic 
<br/><br/><label>Universal Decimal Class. No.: </label>528.9:5.007  / L7