Polenske, K. R. (1974). State estimates of technology, 1963. Lexington Books.
Lua i Stíl Chicago (17ú heag.)Polenske, Karen R. State Estimates of Technology, 1963. Lexington, Mass.: Lexington Books, 1974.
Lua MLA (8ú heag.)Polenske, Karen R. State Estimates of Technology, 1963. Lexington Books, 1974.
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