Durr, Dr L 25 Jahre Zeppelin - Luftschiffban; line engravings, photgraphs diagrams, fold-out plate at back, history of the construction of LZ 126 - 'the reperations airship' later The Los Angeles, original cover with reproduction of portrait of Graf. von. Zeppelin by Reusch; and Teed, Magor; Hydrogen, an official publication on the manufacture of hydrogen for Zeppelins