@book{ BA18698050, author = "Jones, Harold E. and Conrad, Herbert Spencer and Blanchard, M. B. (Myron B.)", title = "Environmental handicap in mental test performance", publisher = "University of California Press", year = "1932", series = "University of California publications in psychology", number = "v. 5, no. 3", URL = "https://ci.nii.ac.jp/ncid/BA18698050" }