TY  - BOOK
AU  - JEFFERS, John N. R.
TI  - An Introduction to Systems analysis: With ecological applications
T2  - A Series of student texts in- Contemporary Biology
SN  - 0-7131-2652-3
PY  - 1978///
CY  - London
PB  - Edward Arnold
KW  - ECOLOGIA
KW  - SISTEMAS
KW  - BIOLOGIA
ER  -