ECK, P. (1966). Blueberry culture. Rutgers University Pr..
Chicago-čujuhus (17. p.)ECK, Paul. Blueberry Culture. New Brunswick, N. J.: Rutgers University Pr., 1966.
MLA-čujuhus (9. p.)ECK, Paul. Blueberry Culture. Rutgers University Pr., 1966.
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