1951. Frigate-bird, oystercatcher, upland plover and various terns on the coast of Tamaulipas, México. Wilson Bull., 63:336.
Selander, R. K.
1958. Age determination and molt in the boat-tailed grackle. Condor, 60:355-376.
1959. Polymorphism in Mexican brown jays. Auk, 76:385-417.
Selander, R. K., and Alvarez del Toro, M.
1955. A new race of booming nighthawk from southern Mexico. Condor, 57:144-147.
Shantz, V. S.
1949. Three new races of badgers (Taxidea) from southwestern United States. Jour. Mammal., 30:301-305.
Smith, H. M.
1946. Handbook of lizards. Comstock Publ. Co., Ithaca, New York. 557 pp.