A number of experiments with lactating sows carried on various rations during the suckling period and continued until the pigs were 60 days old were conducted in the lactating sows with litter project at the Iowa Agricultural Experiment Station.
Proceedings of the Iowa Academy of Science
©1925 Iowa Academy of Science, Inc.
Wallace, Q. W. and Evvard, John M.
"Protein Requirements of Lactating Sows with Litters,"
Proceedings of the Iowa Academy of Science, 32(1), 441-442.
Available at: https://scholarworks.uni.edu/pias/vol32/iss1/115