MAKE A MEME View Large Image ReflectingTelescope 013.jpg NBS Directors S W Stratton second from left and G K Burgess far right pictured with Perkins Observatory director Prof Clifford C Crump center National Institute of Standards and Technology 2/1/1928 National ...
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Keywords: ReflectingTelescope 013.jpg NBS Directors S W Stratton second from left and G K Burgess far right pictured with Perkins Observatory director Prof Clifford C Crump center National Institute of Standards and Technology 2/1/1928 National Institute of Standards and Technology PD-USGov-NIST PD-USGov National Bureau of Standards National Institute of Standards and Technology Reflecting telescopes Telescope mirrors
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