ClarkCharles T., and SchkadeLawrence L.Statistical Analysis for Administrative Decisions, second edition, Cincinnati: South-Western Publishing, 1974.
2.
ErdosPaul L.Professional Mail Surveys.New York: McGraw-Hill, 1970.
3.
HacklerJames C., and BourgettePatricia. “Dollars, Dissonance, and Survey Returns,”Public Opinion Quarterly, 37(Summer 1973), 266–81.
4.
KephartWilliam, and BresslerMarvin. “Increasing the Response to Mail Questionnaires, A Research Study,”Public Opinion Quarterly, 22(Summer 1958), 123–32.
5.
SelltizClaire, JahodaMarie, DeutschMorton, and CookStuart W.Research Methods in Social Relations, revised edition. New York: Holt, Rinehart and Winston, 1959.
6.
ShevkyEshref, and BellWendell. Social Area Analysis.Stanford, California: Stanford University Press, 1955.
7.
U.S. Bureau of the Census, Census of Population and Housing: 1970.Census Tracts, Final Report PHC (1)-89. Houston, Texas SMSA, May, 1972.
8.
WarnerW. Lloyd, MeekerMarchia, and EelsKenneth. Social Class in America.Chicago: Science Research Associates, 1949.
9.
WatsonJohn J.“Improving the Response Rate in Mail Research,”Journal of Advertising Research, 5(June 1965), 48–50.
10.
WisemanFrederick. “Factor Interaction Effects in Mail Survey Response Rates,”Journal of Marketing Research, 10(August 1973), 330–2.
11.
WotrubaThomas R.“Monetary Inducements and Mail Questionnaire Research,”Journal of Marketing Research, 3(November 1966), 398–400.
