Trytten, M. H. (1952). Student deferment in selective service, a vital factor in national security. University of Minnesota Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTrytten, Merriam Hartwick. Student Deferment in Selective Service, a Vital Factor in National Security. Minneapolis: University of Minnesota Press, 1952.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTrytten, Merriam Hartwick. Student Deferment in Selective Service, a Vital Factor in National Security. University of Minnesota Press, 1952.
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