The following documents should serve the further study. I do not know about all the rights on the documents. In so far, I would request to handle them sensibly.

N.A.C.A 1932	Aeroclub Ausschreibung 1932	Herbert Squire Full scale tests of slots and flaps
Luftwacht 8/1932	Luftwacht 9/1932	Luftschau 9/1932
Flugsport 17/1932	Flugsport 18/1932	Flugsport 19/1932
Flugsport 20/1932	Zeitschrift für Motor- und Luftschiffahrt 19/1932