Eilers, L. J., & Roosa, D. M. (1994). The vascular plants of Iowa: An annotated checklist and natural history. University of Iowa Press.
Citace podle Chicago (17th ed.)Eilers, Lawrence J., a Dean M. Roosa. The Vascular Plants of Iowa: An Annotated Checklist and Natural History. Iowa City: University of Iowa Press, 1994.
Citace podle MLA (9th ed.)Eilers, Lawrence J., a Dean M. Roosa. The Vascular Plants of Iowa: An Annotated Checklist and Natural History. University of Iowa Press, 1994.
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