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Comet 1911. 4. (Brooks) H. Knox-Shaw, Helwan Observatory, Egypt, 1911, November, 3d 14h 50m, 30-inch Reflector, focal length, 135in, exposure, 15 min, 10" x 12".

Science Museum Group. Glass positive:- Comet 1911 IV (Brooks) H. Knox-Shaw. 1929-731Science Museum Group Collection Online. Accessed February 21, 2023. collection.sciencemuseumgroup.….

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Science Museum Group. Glass positive:- Comet 1911 IV (Brooks) H. Knox-Shaw. 1929-731Science Museum Group Collection Online.

Glass positive:- Comet 1911 IV (Brooks) H. Knox-Shaw | Science Museum Group Collection

Glass positive:- Comet 1911 IV (Brooks) H. Knox-Shaw, Helwan Observatory, Egypt, 1911, November, 3d 14h 50m, 30-inch Reflector, focal length, 135in, exposure, 15 min, 10" x 12"
collection.sciencemuseumgroup.org.uk
#Comet

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