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Name
Title
Date
Chronology
 
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Α-1Mixed28 May 1931-23 June 1931  
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Α-2Mixed24 June 1931- 14 July 1931  
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Α-3Mixed14 July 1931-7 August 1931  
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Α-4Mixed8 August 1931- 7 September 1931
1 February 1932-19 February 1932
  
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Α-5Mixed20 February 1932-21 March 1932; 6 April, 1932  
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Α-6Mixed20 May 1932.
Rectangular Rock-Cut Shaft (Vanderpool): 15 August 1932-15 October 1932, 9-24 December 1932.
May, June 1933.
25 May 1934-31 May 1934.
23 February 1935-5 March 1935.
  
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Α-7Mixed4 February 1935-31 May 1935
June 1936
  
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Α-8Finds1935, 1936