Jon Carlson (EDT)/ Len Sperry (EDT)
(3)
Katherine Helm/ Jon Carlson/ Len Sperry
(2)
Len (Florida Atlantic University Sperry USA),Jon (Lynn University Sperry Boca Raton Florida USA)
(2)
Len Sperry (EDT)/ Jon Carlson (EDT)/ Jill Duba Sauerheber (EDT)/ Jon Sperry (EDT)
(2)
;Sperry, Len (Florida Atlantic University, USA),Sperry, Jon (Lynn University, Boca Raton, Florida, USA),Bluvshtein, Marina
(2)
Carlson, Jon | Sperry, Len | Lewis, Judith A.
(1)
Jon Carlson/ Len Sperry/ Judith A. Lewis
(1)
Len Sperry/ Jon Carlson/ Diane Hjos/ Diane Kjos
(1)