Text ( visual ) : unmediated Training curriculum leaders for cooperative research / A. Harry Passow ... [et al.]. -- New York : Bureau of Publications, Teachers College, Columbia University , 1955. -- 158 p. : ill. ; 22 cm. -- (The Horace mann-lincoln institute of school experimentation ; Pamphlets). -- (BA4015679X) ; https://ci.nii.ac.jp/ncid/BA4015679X Author Heading(s): Passow, A. Harry