> Publishers' series
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3:
Obstacles to growth demographic, economic and social ed. by Ignacy Sachs
Warszawa: Polish Scientific Publ., 1967
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1:
Planning and economic development ed. by Ignacy Sachs. With a forew. by Oskar Lange
Warszawa: PWN-Polish Scientific Publishers, 1964
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2:
Agriculture, land reforms and economic development ed. by Ignacy Sachs
Warszawa: Państw. Wydawn. naukowe, Polish Scientific Publ., 1964