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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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20 h 6 m, 1 ene 1952 año - 1952- Cohen- first described principals of biological valve
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N. Husk
12 nov 2017
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817
fecha:
20 h 6 m, 1 ene 1952 año
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~ 73 years ago
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