Category:John R. Clarke
American scientist and underwater breathing apparatus authority | |||||
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Date of birth | 20 November 1945 Fort Smith | ||||
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Media in category "John R. Clarke"
The following 2 files are in this category, out of 2 total.
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John Clarke (cropped).png 377 × 503; 164 KB
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John Clarke.png 1,536 × 2,312; 2.43 MB