Douglas Ehninger,... [et al.] Douglas Ehninger,... [et al. Douglas Gunn...[et al.] Douglas A.Downing...[et al.] Douglas Gunn...[et al. Bob Sehlinger...[et al. Douglas A.Downing...[et al. Jacques Monnier,...[et al.] Louis Alexander,...[et al.] Merrill Singer ... [et al.]