1961. The ecology of blackbird (Agelaius) social systems. Ecol. Monogr., 31:285-312.
Paynter, R. A., Jr.
1955. The ornithogeography of the Yucatán peninsula. Peabody Mus. Nat. Hist., Bull. 9:347 pp.
Peterson, R. T.
1960. A field guide to the birds of Texas. Houghton Mifflin Co., Boston. 304 pp.
Pitelka, F. A.
1950. Geographic variation and the species problem in the shore-bird genus Limnodromus. Univ. California Publ. Zool., 50:1-108.
Price, W. A.
1933. Role of diastrophism in topography of Corpus Christi area, south Texas. Bull. Amer. Assoc. Petrol. Geol., 17:907-962.
Robins, C. R., Martin, P. S., and Heed, W. B.