Clark, A. H. (1967). A Monograph of the existing crenoids. United States Government Printing Office.
Citace podle Chicago (17th ed.)Clark, Austin Hobark. A Monograph of the Existing Crenoids. Washington: United States Government Printing Office, 1967.
Citace podle MLA (9th ed.)Clark, Austin Hobark. A Monograph of the Existing Crenoids. United States Government Printing Office, 1967.
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