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  1. By: Babcock, E. B. (Ernest Brown), - Clausen, Jens (Jens Christian),
    Publication info: Berkeley, University of California press, 1929
    Holding Institution: University of California, Davis Libraries
  1. By: Clausen, Jens (Jens Christian),
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 17
    Date: 1964
    Page Range: 173--197
    Publication Info: Berkeley, California Botanical Society,
  2. By: Clausen, Jens (Jens Christian),
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 17
    Date: 1964
    Page Range: 295--295
    Publication Info: Berkeley, California Botanical Society,
  3. By: Crum, Ethel Katherine. - Abrams, Le Roy, - Babcock, E. B. (Ernest Brown), - Epling, Carl, - Ferris, Gordon Floyd, - Howell, John Thomas, - Miller, A H - Mason, H. L. (Herbert Louis), - Miller, L H - Darlington, C. D. (Cyril Dean), - Clausen, Jens (Jens Christian), - Sumner, Francis B. (Francis Bertody), - Keck, David Daniels, - Dobzhansky, Theodosius, - Mcminn, H E
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 2
    Date: 1933
    Page Range: 110--112
    Publication Info: Berkeley, California Botanical Society,
  4. By: Clausen, Jens (Jens Christian), - Channell, R. B. (Robert Bennie),
    Type: Article
    In: Rhodora
    Volume: 66
    Date: 1964
    Page Range: 32--46
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],