TY - BOOK
AU - Mallory, Virgil S.
TI - The relative difficulty of certain topics in mathematics for slow-moving ninth grade pupils
PB - Bureau of Publications Teachers College, Columbia University
KW - Hochschulschrift
PY - 1939
BT - Teachers College, Columbia University contributions to education ; 769
CY - New York
UR - http://slubdd.de/katalog?TN_libero_mab2
ER -
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