1. 09.  Reference The picture exchange communication system training manual / by Frost, Lori. Publication: Newark, DE : Pyramid Educational Products, 2002 . 396 p. ; 28 cm. Date:2002 Availability: Copies available: (1), Actions:
2. 09.  Reference The pyramid approach to education in autism / by Bondy, Andy. Publication: Newark, Del. : Pyramid Educational Products, 2002 . vi, 236 p. : 26 cm. Date:2002 Availability: Copies available: (1), Actions: