Nevsky: Hero of the People Hatter M: The Looking Glass Wars Wire Mothers: Harry Harlow and the Science of Love (goodereader.com)
The young monkeys preferred heated, cloth covered mothers to wire mothers at any stage of their development. (personalityresearch.org)
Harlow found that the infant monkeys would receive food from the wire mother, but preferred to spend most of their time with the soft mother. (verywellmind.com)