*"Why Go To The Arctic", January 1931, Popular Mechanics drawing of ill fated Andree balloon flight top page 26*"Ice Balloon: Doomed Arctic expedition to the North Pole", bbc.co.uk video
* «Why Go To The Arctic», January 1931, Popular Mechanics drawing of ill fated Andree balloon flight top page 26* «Ice Balloon: Doomed Arctic expedition to the North Pole», bbc.co.uk video