Cornell University Library Digital Collections
- Springenschmid, Karl 3
- Galvão, Henrique, 1895-19702
- Appleton, LeRoy H.1
- Ayres, Sydney E. & Mrs. Walter A. Henricks, compilers1
- Fortune1
- Galvao, Henrique1
- H. Leithäusl1
- Leers, Johann von, 1902-19651
- Noll, Hugo1
- Plaisted, Charles Maxwell1
- Österr. Air and Gas Protection Association1
