Douglas Ehninger,... [et al.] Douglas Gunn...[et al.] Douglas A.Downing...[et al.] Jacques Monnier,...[et al.] by Douglas Biber...[et al.] Louis Alexander,...[et al.] Merrill Singer ... [et al.] Douglas A. Bernstein,...[et al.] Alan P. Wagner,...[et al.] Bertram L. Linder,...[et al.]