BY-SA 4.0 Creative Commons Attribution-Share Alike 4.0 truetrue English A Scientist in the Laboratory Igbo Nwata akwụkwọ na-ahụ maka nyocha n'ụlọ nyocha Wikimedia...
An elementary treatise on photopographic methods and instruments, including a concise review of executed photopographic surveys and of publications on...
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because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the...
