00485cam a2200157 i 4500020001500000040000800015082002600023100002200049245007200071260004800143300003100191490005400222500001900276650001200295650002000307  a0839113056  cDLC  a574 UNI 1978 A059 Or.10aJeffers, J. N. R.13aAn introduction to systems analysis, with ecological applications /0 aBaltimore :bUniversity Park Press,c[1978]  ax, 198 p. :bill. ;c22 cm0 aA series of student texts in contemporary biology  aIncludes index 0aEcology 0aSystem analysis