Hippel, Eric Von <br/><br/>
Sources of innovation 

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 - Oxford University Press , New York  1988 
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 - .
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<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental problems & services-- Social problems & services
<br/><br/><label>Dewey Class. No.: </label>363.7  HIP-S