Douglas Gunn...[et al.] Douglas Ehninger,... [et al.] Douglas A.Downing...[et al.] Susan Cain...[et al.] by Douglas Biber...[et al.] by Douglas Pancoast...[et al.] Douglas A. Bernstein,...[et al.] Thomas Braun...[et al.] Uwe Hansmann...[et al.] by Allan Ben...[et al.]