00326nam a2200109Ia 4500008004100000082002500041100002000066245004400086260003600130300002800166490002200194250701b        |||||||| |||| 00| 0 eng d  a519.5024574bL673.NM  aLewis, Edwin R.  aNetwork models in population biologyb/  aBerlin:bSpringer-Verlag,c1977  axii, 402p. Index, Bibl.  aBiomathematicsv7