TY  - BOOK
AU  - NORTHROP Robert B
AU  -  CONNOR Anne N
TI  - Ecological sustainability:  Understanding complex issues.   
SN  - 9781466565128
U1  - X:77:(G:55), Q3 
PY  - 2013///
CY  - Newyork
PB  - C.R.C Press         
KW  - Geography
ER  -