We wish to help you with what you are looking for and can recommend the following book:
TANK. WAGNER, WOLFGANG. Kurt Tank -Konstrukteur und Testpilot bei Focke-Wulf. Das Lebenswerk eines der großen deutschen Flugzeugkonstrukteure. In Text, 130 Bildern, 56 Tabellen und 76 Zeichnungen. Mit eigenen Berichten über die Erprobung seiner Flugzeuge. Illustrated. München, Bernard & Graefe Verlag, 1980. 4to. 272 pp. Somewhat poor print on some pages. Publ. cased boards with dust-wrapper. ¶ (Die deutsche Luftfahrt. Buchreihe über die Entwicklungsgeschichte der deutschen Luftfahrttechnik 1.) DKK~ 160 NOK~ 170 SEK 200 EUR~ 20 USD~ 33 GBP~ 15 JPY~ 3.477 · ERT200150 · Antikvariat Erato, Stockholm (SE) ·

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