'SCIENCE NOTES; Snow Vehicle 'Floats' on Jumbo Tires--Cheaper Power', New York Times
Tags: 1950s; 1956; 1956-5-13
'SCIENCE IN REVIEW; Radioactive Study of Fossil-Bearing Rock Dates Life on Earth 2 Billion Years Ago', New York Times
Tags: 1950s; 1956; 1956-5-13; Kaempffert, Waldemar
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