References
- Bureau of the Census. U.S. Department of Commerce, 1970 Census of Population and Housing, Census Tracts, Brownsville‐Harlingen‐San Benito, Texas, PCH 80(1)‐33.
- Bureau of the Census, U.S. Department of Commerce, 1980 Census of Population and Housing, Census Tracts, McAllen‐Pharr‐Edinburg, Texas, PCH 80(2)‐104.
- Bureau of the Census, U.S. Department of Commerce, 1970 Census of Population and Housing, Census Tracts, McAllen‐Pharr‐Edinburg, Texas PCH (1)‐126.
- Bureau of the Census, U.S. Department of Commerce, 1980 Census of Population and Housing, Census Tracts, McAllen‐Pharr‐Edinburg, Texas PCH 80(2)‐236.
- Charles J. Ellard and J. Michael Patrick are both members of the Department of Accounting and Economics at Pan American University, Edinburg, Texas.