TY  - BOOK
AU  - Hartmann, H.F.
AU  - Norman, N.
AU  - Triffett, A.
TI  - Nature in the Balance
SN  - 0435573926
U1  - 304.2 
PY  - 1972///
CY  - London
PB  - Heinemann Educational Books
KW  - Social Sciences
ER  -