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  1. The prickly pear as a farm crop. By David Griffiths ...
    By: Griffiths, David.
    Publication info: Washington,Govt. print off.,1908.
    Contributed by: Library of Congress
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  2. Summary of recent investigations of the value of cacti as stock food.
    By: Griffiths, David. - Hare, R. F.
    Publication info: Washington,1907.
    Contributed by: Library of Congress
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