Kalthoff, K. (2001). Analysis of biological development (2nd ed.). McGraw-Hill.
Chicago-čujuhus (17. p.)Kalthoff, Klaus. Analysis of Biological Development. 2nd ed. Boston: McGraw-Hill, 2001.
MLA-čujuhus (9. p.)Kalthoff, Klaus. Analysis of Biological Development. 2nd ed. McGraw-Hill, 2001.
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