Przedpelski, B. J. (1948). Agricultural Extension Education in Poland 1918-1939. Columbia Univ.
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Dyfyniad Arddull Chicago
Przedpelski, Boleslaw Jozef. Agricultural Extension Education in Poland 1918-1939. New York: Columbia Univ, 1948.
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Dyfyniad MLA
Przedpelski, Boleslaw Jozef. Agricultural Extension Education in Poland 1918-1939. Columbia Univ, 1948.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.