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edited by Dianne Zager, Michael L. Wehmeyer, and Richard L. Simpson
Routledge 2012
: pbk
Available at 3 libraries
Craig R. Fiedler, Richard L. Simpson, Denise M. Clark
Pearson Merrill/Prentice Hall c2007
: pbk.
Available at 2 libraries
Richard L. Simpson with coauthors Sonja R. de Boer-Ott... [et al.]
Corwin Press c2005
cloth , pbk.
Available at 4 libraries
Paul Zionts, Laura Zionts, Richard L. Simpson
Corwin Press 2002
: hard. , : pbk.
Richard L. Simpson and Paul Zionts
Pro-Ed c2000 2nd ed
Available at 1 libraries
Brenda Smith Myles and Richard L. Simpson
Pro-Ed c1998
Richard L. Simpson ... [et al.]
Council for Exceptional Children c1997 2nd ed
: paper
Richard L. Simpson
Pro-Ed c1996 3rd ed
PRO-ED c1990 2nd ed
Aspen Systems, c1982
edited by Richard L. Simpson
Pro-Ed
