Wallin, J. E. W. (1925). Studies of mental defects and handicaps.
Lua i Stíl Chicago (17ú heag.)Wallin, J. E. Wallace. Studies of Mental Defects and Handicaps. [Oxford, O, 1925.
Lua MLA (8ú heag.)Wallin, J. E. Wallace. Studies of Mental Defects and Handicaps. 1925.
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