Publications
.
1986. Zoogeography of the freshwater fishes of the southeastern United States: Savannah River to Lake Pontchartrain. The zoogeography of North American freshwater fishes.. :213-265.
.
1986. Zoogeography of freshwater fishes of the western gulf slope of North America. The zoogeography of North American freshwater fishes.. :413-456.
.
1986. Zoogeography of fishes of the Yukon and Mackenzie Basins. The zoogeography of North American freshwater fishes.. :639-674.
.
1969. Western Atlantic Sponge Dwelling Gobies of the Genus Evermannichthys Their Taxonomy Habits and Relationships. Proceedings of the Academy of Natural Sciences of Philadelphia. 21:1-24.
.
1982. Victims of history - a nonequilibrium approach to evolution. Systematic Zoology. 31:1-24.
.
1988. Vicariance biogeography. Annual Review of Ecology and Systematics. 19:513-542.
.
1979. Ventral Gill Arch Muscles and the Phylogenetic Relationships of Latimeria-Chalumnae. Occasional Papers California Academy of Sciences. O:56-67. Abstract
.
1998. Vascular plants new to Kansas. Sida. 18:593–604.
.
2003. The vascular flora of the Ogallala ecotone on the Dempsey Divide, Roger Mills County, Oklahoma. Sida. 20(3):1215-1243.
.
1970. Variation in Populations of the Fish Cottus-Carolinae in the Alabama River System with Description of a New Subspecies from Below the Fall Line. American Midland Naturalist. 83:368-381.
.
2008. The varasichthyid and other crossognathiform fishes, and the Break-up of Pangaea. Geological Society London Special Publications. 295(1):71.
.
1990. The Urohyal - Development and Homology within Osteichthyans. Journal of Morphology. 203(3):247-282.
.
1961. Two new cottid fishes from the fresh waters of eastern United States. Copeia. 1961:305-315. Abstract
.
1964. Two new Bahaman gobiid fishes of the genera Lythrypnus and Garmannia. Notulae Naturae [Philadelphia]. 364:1-6. Abstract
.
2008. Twenty three microsatellite DNA loci for population genetic studies and parentage assignment in orangethroat darter, Etheostoma spectabile. Molecular Ecology Resources. 8(6):1483-1485.
.
2012. A tristichopterid sarcopterygian fish from the upper Middle Devonian of Nevada. Historical Biology. 24:425-440.
.
1983. Trichomycterus-Chungaraensis New-Species and Trichomycterus-Laucaensis New-Species (Pisces, Siluriformes, Trichomycteridae) from the High Andean Range. Studies on Neotropical Fauna and Environment. 18(2):65-88. Abstract
.
1952. Tri-sodium phosphate as a storage medium for otoliths. Copeia. 1952:207. Abstract
.
2006. Tonestus. Flora of North America. 20:181-184.
.
1985. Theories and Methods in Different Approaches to Phylogenetic Systematics. Cladistics. 1:1-11. Abstract
.
Submitted. Temporal sequence and morphological variation in Jurassic fishes of southern Germany. :15-18.
.
1974. Systematics and evolution of the Greater Antillean hylid frogs. University of Kansas. Occasional papers of the Museum of Natural History. :1–60.
.
1957. The systematic status of the suckers of the genus Moxo-stoma from Texas, New Mexico and Mexico. Tulane Stud Zool. 5:289-318. Abstract
.
1980. Systematic Aspects of Basilichthys from Chile (Pisces, Atherinidae). Archivos De Biologia Y Medicina Experimentales. 13(1):140-140.

]