Monkey Research
Photo Researchers, Inc.
Experimental Monkey
Science Source
Primate Fear Testing
Science Source
Harlow Monkey Experiment
Science Source
Harlow Monkey Experiment #1
Science Source
Animal Research
Photo Researchers, Inc.
Primate Research
Science Source
Maternal Deprivation Research #2
Science Source
Maternal Deprivation Research
Science Source
Nursery Cages
Science Source
Maternal Deprivation Research #3
Science Source
Primate Fear Testing #1
Science Source
Animal Research #1
Science Source
Animal Research #2
Science Source