00637nam0 2200217 450 00001113520080514104252.020080514d1946----km-y0itay50------baengUSy-------001-yVital problems of air commerceedited by L. ZacharoffNew YorkDuell, Sloan & Pearce1946xv, 338 p.21 cm387.720Zacharoff,Lucien631219ITUNIPARTHENOPE20080514RICAUNIMARC000011135387.7/1058983NAVA1Vital problems of air commerce1204139UNIPARTHENOPE