Sam Abell(1)
Thomas B. Allen(1)
Jay Apt(1)
Nick Baker(1)
Donald Joyce Borror(1)
Christopher Brickell(1)
Tom Brokaw(1)
Kenneth Brower(1)
M. Barbara Brownell(3)
C. D. B. Bryan(1)
William Henry Burt(1)
Jane Heath Buxton(1)
Arthur C. Clarke(1)
Sierra Club(1)
Donald J. Crump(2)
Nicholas D'Archimbaud(1)
Robert S. Devine(1)
Reader's Digest(2)
Brian M. Fagan(1)
Ron Fisher(3)
Roy A. Gallant(1)
Catherine O'Neill Grace(2)
Noel Grove(1)
Mary Ann Harrell(1)
Ian Harrison(1)
Malcolm Hillier(1)
Roger B. Hirschland(1)
Children's Bible Hour(1)
Catherine Herbert Howell(1)
Peter Jenkins(2)
Dana Johnson(1)
Paul Johnson(1)
Walter Karp(1)
Austin Melvin Knight(1)
K. M. Kostyal(2)
Ralph M. Kovel(1)
Meriwether Lewis(1)
Jack London(1)
Paul D. Martin(1)
John P. McCarthy(1)
John P. Mccarthy, Jr.(1)
Jane R. McCauley(4)
David McCullough(1)
Bart McDowell(1)
Jane R. McGoldrick(1)
Susan McGrath(3)
Margaret McKelway(1)
Tom Melham(1)
James Miller(1)
John Moore(1)
James O'Horeton(1)
Anne Oman(1)
Robert Patterson(1)
George A. Petrides(1)
Sharon Pierce(1)
Antony Preston(1)
Ferdinand Protzman(1)
DK(1)
Rh Value Publishing(1)
Elizabeth Rathbun(1)
Judith E. Rinard(2)
Mervin F. Roberts(1)
Carlo Sellari(1)
National Geographic Society(10)
Gene S. Stuart(4)
Curt Suplee(1)
Emelie Tolley(1)
James Trefil(1)
Craig Tufts(1)
Jennifer C. Urquhart(1)
John T. Yount(1)