Eilers, L. J., & Roosa, D. M. (1994). The vascular plants of Iowa: An annotated checklist and natural history. University of Iowa Press.
Dyfyniad Arddull ChicagoEilers, Lawrence J., and Dean M. Roosa. The Vascular Plants of Iowa: An Annotated Checklist and Natural History. Iowa City: University of Iowa Press, 1994.
Dyfyniad MLAEilers, Lawrence J., and Dean M. Roosa. The Vascular Plants of Iowa: An Annotated Checklist and Natural History. University of Iowa Press, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.