Play: early and eternal.

od Mears, C E, Harlow, H F
Izdano 1975

Total social isolation in monkeys.

od Harlow, H F, Dodsworth, R O, Harlow, M K
Izdano 1965

Effects of Combined Frontal and Temporal Lesions on Learned Behaviors in Rhesus Monkeys

od Harlow, H. F., Schiltz, K. A., Blomquist, A. J., Thompson, C. I.
Izdano 1970