محمود توسلی author text article 1989 per - University of Tehran 0039-8969 31 v. 41 no. 1989 https://jte.ut.ac.ir/article_25269_5b797a958818c339887e540c76a0893b.pdf توماس ام . هامفری author اکبر کمیجانی author text article 1989 per - University of Tehran 0039-8969 31 v. 41 no. 1989 https://jte.ut.ac.ir/article_25270_05850333c22a5ef33060dd516e41b9c1.pdf دکتر مجید احمدیان author text article 1989 per - University of Tehran 0039-8969 31 v. 41 no. 1989 https://jte.ut.ac.ir/article_25271_30569620d1a022f1111d235a903ea659.pdf هادی صمدی author text article 1989 per - University of Tehran 0039-8969 31 v. 41 no. 1989 https://jte.ut.ac.ir/article_25272_80d69d88dc26e09414ed7e7d4c0bcba6.pdf unknown author text article 1989 per - University of Tehran 0039-8969 31 v. 41 no. 1989 https://jte.ut.ac.ir/article_25273_c219ac6b4d45ab8871f65b2f1a679c37.pdf