Douglas A.Downing...[et al.] Douglas A.Downing...[et al. Douglas Gunn...[et al.] Douglas Ehninger,... [et al.] Douglas Gunn...[et al. Douglas A. Bernstein,...[et al.] Douglas Ehninger,... [et al. Paul Harding...[et al.] William A. Ewing...[et al.] Douglas A. Bernstein,...[et al.