1907 pocketbookofaero00moediala
1907 romanceofmoderni00williala
1920 explorerinairser00bingiala
1920 aeroplanehandboo00swinrich
1920 airplanephotogra00ivesrich
1920 metalsinaircraft00hanbrich
1920 opportunitiesina00sweerich
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1916 flyingmentheirma00wincrich
1918 elementsofaviati00bacorich
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