Published by Walter De Gruyter, Eicklingen, Germany, 1921
Seller: poor man's rare books (mrbooks) IOBA NJB, Vineland, NJ, U.S.A.
Association Member: IOBA
First Edition
Cloth. Condition: Good+ with no dust jacket. Presumed 1st. charts, diagrams; 117 [2] pages; Small book, text somewhat toned. Mathematics of ballooning. Text, diagrams, formulae. German langauge, book is solid with no markings.