Roberts, F. S. (1976). Discrete mathematical models with applications to social, biological and environmental problems. Prentice-Hall.
Chicago Style aipamenaRoberts, Fred S. Discrete Mathematical Models with Applications to Social, Biological and Environmental Problems. Englewood Cliffs, N. J: Prentice-Hall, 1976.
MLA aipamenaRoberts, Fred S. Discrete Mathematical Models with Applications to Social, Biological and Environmental Problems. Prentice-Hall, 1976.
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