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COX W L AND OTHERS, . (1955). BASIC PRINCIPLES OF GUIDENCE. NEW YORK: PRINTICE HALL.
COX W L AND OTHERS, . 1955. BASIC PRINCIPLES OF GUIDENCE. NEW YORK: PRINTICE HALL.
COX W L AND OTHERS, . BASIC PRINCIPLES OF GUIDENCE. NEW YORK: PRINTICE HALL. 1955.