Tharp, Roland G; Wetzel, Ralph J <br/><br/>
Behaviour modification in the natural environment 

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 - Academic Press, New York  1969 
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<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animal behaviour patterns
<br/><br/><label>Dewey Class. No.: </label>591.5  THA-B