University of Texas. Bureau of Business Research & Dale, A. G. (1955). An economic survey method for small areas.
Lua i Stíl Chicago (17ú heag.)University of Texas. Bureau of Business Research agus Alfred G. Dale. An Economic Survey Method for Small Areas. Austin, 1955.
Lua MLA (8ú heag.)University of Texas. Bureau of Business Research agus Alfred G. Dale. An Economic Survey Method for Small Areas. 1955.
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