"June, 1922." "Reprint from Berichte und Abhandlungen der Wissenschaftlichen Gesellschaft fűr Luftfahrt (Supplement to Zeitschrift fűr Flugtechnik und Motorluftschiffahrt), No. 6, January, 1922"--Page 1. "Translated by the National Advisory Committee for Aeronautics"--Page 13. Includes errata. No Federal Depository Library Program (FDLP) item number.