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LUFTKRIEG 1938 von Major Helders [pseudonym].
Berlin: Traditions-Verlag Kolk & Co., n.d. [1934]. Octavo, pp. [1-8] 9-148 149-150: ads [151-152: blank] [note: first and last leaves are blanks], three maps and three plans on a single folded sheet inserted at rear, original light green cloth, front and spine stamped in red. Second edition. (#140747)
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