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IR book

  • From: Edward Meyers <aghalide@xxxxxxxxx>
  • Subject: IR book
  • Date: Fri, 14 Feb 1997 15:17:17 -0500 (EST)
In my library I have a book called, "Practical Infra-Red
Photography, by Dr. Othmar Helwich. In English and published
in England, there's no copyright date in it. I think it
might be pre- WWII. The ads for cameras look like 1939 cameras.
Anyone shed some light on this? Ed Meyers


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