TY  - BOOK
AU  - Markham,Rosemary June
TI  - The behaviour and environmental requirements of orang-utans under long-term captive conditions
PY  - 1990///
CY  - (S.l. : s.n.)
KW  - Orangutan
N1  - Thesis (Ph.D.) - The University of Western Australia, 1990
ER  -