Ritchie William <br/><br/>
Surveying and mapping for field scientists 
Ritchie William 
 - 2 
 - England  Longman            1988 
 - ix,180p Bib p. 173-74  cm. 
<br/><br/> Published previously as mapping for field scientists 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography
<br/><br/><label>Dewey Class. No.: </label>U11, L7;M8