National Wildlife Federation Magazine 1992 Feb / March -Snow Owl

National Wildlife Magazine 2001 February / March

National Wildlife Magazine April May 1976-9C

National Geographic Magazine May 1982

National Geographic Magazine August 1987 Africa Sahel, Rock Art, Moose, Nature

National Geographic Magazine October 1975, Vol 148, No 4

National Geographic Magazine October 1982 The Chip, Silicon valley, Thailand

National Geographic August 1987 Vol 172 #2 Africa, Rock Art, Fur Trading, Moose