Aquatic and wetland plants of southwestern United States - Correll, Donovan Stewart, 1908 -1983 (Environmental Protection Agency; [For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1972)

Aquatic and wetland plants of southwestern United States - Correll, Donovan Stewart, 1908 -1983 (Environmental Protection Agency; [For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1972)

Contributions from the Gray Herbarium of Harvard University - Harvard University. Gray Herbarium. (Harvard University, 1982)

The University of Texas herbaria : type register - Todzia, Carol A., 1955 - (Plant Resources Center, Dept. of Botany, University of Texas, 1994)

Wrightia - University of Texas at Dallas. (University of Texas at Dallas, 1959)

Wrightia - University of Texas at Dallas. (University of Texas at Dallas, 1959)