1. 09.  Reference How to use systematic attention and approval / by Hall, R. Vance Publication: Austin, Tex. Pro-ED, 1998 . vi, 39 p. : 23 cm. Date:1998 Availability: Copies available: (1), Actions:
2. 09.  Reference How to select reinforcers / by Hall, R. Vance Publication: Austin, Tex. : Pro-Ed., 1998 . vi, 38 p. ; 23 cm. Date:1998 Availability: Copies available: (1), Actions:
3. 09.  Reference How to use group contingencies / by Axelrod, Saul. Publication: Austin, Tex. : Pro-Ed, 1998 . viii, 23 p. ; 23 cm. Date:1998 Availability: Copies available: (1), Actions: