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- a42002007 contributor B12842789.
 - a42002007 created "1941.".
 - a42002007 date "1941".
 - a42002007 date "1941.".
 - a42002007 dateCopyrighted "1941.".
 - a42002007 description "Bibliography: p. 96-98.".
 - a42002007 description "Thesis (Ph. D.)--University of Pennsylvania, 1941.".
 - a42002007 extent "iv, 115 p. incl. tables.".
 - a42002007 issued "1941".
 - a42002007 issued "1941.".
 - a42002007 language "eng".
 - a42002007 publisher "Philadelphia,".
 - a42002007 subject "371.928".
 - a42002007 subject "Arithmetic Study and teaching.".
 - a42002007 subject "Children with mental disabilities Education.".
 - a42002007 subject "LB1091 .C65".
 - a42002007 title "The responses of mentally retarded children to specialized learning experiences in arithmetic [by] Helen Marjorie Costello.".
 - a42002007 type "text".