Statistical directory of state institutions for the defective, dependent and delinquent classes
At head of title: Department of commerce. Bureau of the census. Sam L. Rogers, director "This publication was planned by Dr. H.H. Laughlin, superintendent of the Eugenics record office, Cold Spring Harbor, N.Y., who as special agent of the Bureau of the census had charge of the collection of the data. The data were tabulated and the volume prepared in the Division of revision and results in this bureau under the charge of Dr. Joseph A. Hill, assisted by Reginald L. Brown."--"Letter of transmittal", p. 5
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