Directing learning / Robert W. Frederick ... Clarence E. Ragsdale ... and Rachel Salisbury. Frederick, Robert W. (Robert Wendell), 1899-1973. Ragsdale, Clarence E. (Clarence Edwin), 1893-1953, joint author. Salisbury, Rachel, 1895-1977, joint author. Study skills. Learning, Psychology of. 371 ROD "Selected references" at end of most of the chapters; "A comprehensive, classified bibliography on study": p. 497-511. New York : D. Appleton-Century, c1938. c1938. 1938 Text xvi, 527 p. : eng Appleton series in supervision and teaching