Van Oirschot, J. T. (1980). Persistent and inapparent infectionss with swine fever virus of low virulence: Their effects on the immune system. Rijksuniversiteit te Utrecht.
Lua i Stíl Chicago (17ú heag.)Van Oirschot, Johannes Theodorus. Persistent and Inapparent Infectionss with Swine Fever Virus of Low Virulence: Their Effects on the Immune System. Utrecht: Rijksuniversiteit te Utrecht, 1980.
Lua MLA (8ú heag.)Van Oirschot, Johannes Theodorus. Persistent and Inapparent Infectionss with Swine Fever Virus of Low Virulence: Their Effects on the Immune System. Rijksuniversiteit te Utrecht, 1980.
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