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1. 

   Fertilizer Material Mined Faster with New Equipment

   By Science NewsAugust 13, 1949

2. 

   Russian Venus Vehicle Halfway by April 3

   By Science NewsMarch 25, 1961

3. 

   February 6, 1932

   By Science NewsFebruary 6, 1932

4. 

   January 9, 1932

   By Science NewsJanuary 9, 1932

5. 

   January 2, 1932

   By Science NewsJanuary 2, 1932

6. 

   July 24, 1926

   By Science NewsJuly 24, 1926

7. 

   February 20, 1932

   By Science NewsFebruary 20, 1932

8. 

   February 13, 1932

   By Science NewsFebruary 13, 1932