File:Curtiss-Bleecker helicopter Aero Digest July,1930.jpg
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Size of this preview: 799 × 243 pixels. Other resolutions: 320 × 97 pixels | 640 × 195 pixels | 2,106 × 641 pixels.
Original file (2,106 × 641 pixels, file size: 365 KB, MIME type: image/jpeg)