University of Michigan (1) The Board (1) University of Chicago Press for the Society for Research in Child Development [etc.] (1) U.S. Dept. of Agriculture, Agricultural Research Service [for sale by Supt. of Documents] (1) U. S. Dept. of Transportation, Federal Railroad Administration, Office of Safety (1) The Office (1) U.S. Dept. of Education, Office of Student Financial Assistance], 1982 (1) John Wiley & Sons, Inc (1) The Commission, 1935 (1) U.S. Department of Transportation, Federal Railroad Administration, Office of Safety (1) Published by the University of Chicago Press for the Society for Research in Child Development [etc.] (1) Kraus Reprint Corp., 1961 (1) Bureau of Plant Industry, U.S. Dept. of Agriculture (1) 1879 (1)