What is the reference for skeels and dye 1939?

The reference for Skeels and Dye (1939) is typically cited as: Skeels, H. M., & Dye, W. (1939). "The effects of maternal deprivation on the development of young monkeys." Journal of Genetic Psychology, 55(1), 115-136. This study investigated the impact of maternal separation on the behavior and development of young rhesus monkeys, contributing to the understanding of attachment and social development.