Donald R. Prothero/ Timothy D. Callahan/ Michael Shermer (FRW)
(2)
Sly, Gordon,Callahan, Michael R. (Michigan State University, USA)
(2)
Corinne Grimes Ph.d./ Sandra S. Swick Rn/ Rita R. Callahan
(1)
Michelle R. Callahan Ph.D.
(1)
R. Callahan (EDT)/ N. Adams (EDT)
(1)
R. M. Douglas (EDT)/ Michael D. Callahan (EDT)/ Elizabeth Bishop (EDT)
(1)
Sandra S. Swick R.N. B.C.,, Rita R. Callahan R.N. B.S.N
(1)