A revision of the Family Geastraceae Ponce de Leon, Patricio. creator text book Chicago, Ill Field Museum of Natural History 1968 1968
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ENG Geastraceae QK1 .F4 v. 31, no. 14 589/.221 Fieldiana, Botany, v. 31, no. 14 https://www.biodiversitylibrary.org/bibliography/42247 Publication (Field Museum of Natural History), 1039 https://www.biodiversitylibrary.org/bibliography/2389 983382 10.5962/bhl.title.2389