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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Wester, R.E. - Drechsler, Charles - Jorgensen, Hans
    Type: Article
    In: The Plant Disease Reporter
    Volume: 42
    Issue: 4
    Date: 1958
    Page Range: 413-415 4 Figures
  2. By: Sampson, Cassandra - Jorgensen, Hans
    Type: Article
    In: Animal keepers' forum
    Volume: 37
    Issue: 5
    Date: 2010-05
    Page Range: 169--172
    Publication Info: Topeka, Kan, American Association of Zoo Keepers,