01052nam a2200289 i 450099100082977970753620020507174131.0981214s1976 us ||| | eng 013214171Xb10763120-39ule_instLE01302958ExLDip.to Matematicaeng511.5AMS 05-01AMS 60J10Roberts, Fred S.26170Discrete mathematical models :with applications to social, biological, and environmental problems /Fred S. RobertsEnglewwod, N. J :Prentice-Hall,c1976xvi, 559 p. ;23 cm.Includes bibliographies and indexCombinatorial analysis.b1076312021-09-0628-06-02991000829779707536LE013 05-XX ROB21 (1976)12013000106045le013-E0.00-l- 01010.i1085857x28-06-02Discrete mathematical models923299UNISALENTOle01301-01-98ma -engus 01