00679nam a22002657i 4500 20141212085928.0 880815s1988 sp gr 000 0 spa c 0014-4029 (papel) eng WALKER, D.K. WHO LEAVES AND WHO STAYS IN SPECIAL EDUCATION: A 2-YEAR FOLLOW-UP STUDY Discapacidad Educación especial Estudio longitudinal Discapacidad Documental EXCEPTIONAL CHILDREN Vol. 54, no. 5 (1988), p. 393-402 11 74 C1 P1c AR 19880815 R.120 AR