TY  - BOOK
AU  - Roberts, Fred S.
TI  - Discrete mathematical models: with applications to scocial, biological, and environmental problems
SN  - 013214171X
U1  - 511.80243 
PY  - 1976///
CY  - New Jersey
PB  - Prentice-Hall
KW  - Biology--Mathematical models
KW  - Mathematical models,Social Sciences
N1  - Includes bibliographies and index
ER  -