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BERNHARDT KARL S, . (1964). DISCIPLINE AND CHILD GUIDANCE. N.Y: MCGRAW-HILL.
BERNHARDT KARL S, . 1964. DISCIPLINE AND CHILD GUIDANCE. N.Y: MCGRAW-HILL.
BERNHARDT KARL S, . DISCIPLINE AND CHILD GUIDANCE. N.Y: MCGRAW-HILL. 1964.