National Geographic : 1964 Feb
EKTACHROME(ABOVE) BY HICHAHRC. IUMKINO ANU UAUvlIKUnh. rTcln i. ulmt-L Daring para-explorers challenge one of earth's last "blank spots"-the high, virtually unknown world of Peru's Cordillera Vilcabamba. G. Brooks Baekeland, Peter R. Gimbel, Jack Joerns, and Peter A. Lake, mem bers of a National Geographic Society-New York Zoo logical Society party who parachuted into this region, depended on supplies dropped from two Helio Couriers. Working the steering lines of a special high-altitude parachute, slotted to slow its descent, Joerns practices for'his jump into the rugged Vilcabamba.