Space use selectivity by chimpanzees and gorillas in an indoor-outdoor enclosure.
Ross
S R
SR
Lester E. Fisher Center for the Study and Conservation of Apes, Lincoln Park Zoo, 2001 North Clark Street, Chicago, IL 60614, USA. sross@lpzoo.org
Calcutt
S
S
Schapiro
S J
SJ
Hau
J
J