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Ed Begle
Film project contact sheet
H. Stewart Moredock
H. Stewart Moredock
H. Stewart Moredock
H. Stewart Moredock
H. Stewart Moredock
H. Stewart Moredock
H. Stewart Moredock
H. Stewart Moredock
H. Stewart Moredock
H. Stewart Moredock
Jack Abad
Jack Abad
Jack Abad
Jack Abad
John L. Kelley
Modern Learning Aids; A Brief Course in Mathematics for Elementary School Teachers
School Mathematics Study Group writing group
Two unidentified men working at machine