Berg,,Gerald, & Berg , G.. (1978). Indicators of viruses in water and food. Ann arbor science.
Chicago Style aipamenaBerg,,Gerald, and Gerald Berg. Indicators of Viruses in Water and Food. Michigan: Ann arbor science, 1978.
MLA aipamenaBerg,,Gerald, and Gerald Berg. Indicators of Viruses in Water and Food. Ann arbor science, 1978.
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