المؤلفون: Perzan, Ronald S., Boulanger, Fabien, Fischer, Donald G.

المصدر: Journal of Behavior Therapy and Experimental Psychiatry ; volume 3, issue 2, page 129-133 ; ISSN 0005-7916

الاتاحة: http://dx.doi.org/10.1016/0005-7916(72)90013-4
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