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by Colorado Mountain Club; Luthi, Ward (CON)
by Robertson, Leigh; Kassar, Christine
by Unknown
by Young, Mary Taylor
by Silverthorn, Suzanne
by Apt, Alan; Turnbaugh, Kay
by Kong, Dolores; Ring, Dan; National Geographic Society (U. S.)
by Kong, Dolores; Ring, Dan
by Molvar, Erik
by Martinez, Rod