REFERENCES l. Memorandum from Dr. J. H. Harley to Mr. M. Eisenbud, "Rongelap Resurvey Samples from NRDL", April 17, 1956. Letter of May 9, 1956 from Dr. H. Weiss to Edward Hardy. 3. Memorandum from G. Hamada to Dr. J. H. Harley, “The Effect of the Wet Ashing Technique Used at HASL on Ruthenium Volatilization", March 29, 1956. Private communication, Mr. I. B. Whitney. “Analyzing Beta Absorption Graphically to Identify Emitters", J. H. Harley and N. Hallden, Nucleonics, 13, 1, January 55, pp 32-35. Letter of May 2, 1956 from Dr. S. Cohn to Mr. I. B. Whitney. HASL Laboratory Report 56-1, "Standardization and Operation of Fallout Counters", N. A. Hallden and J. H. Harley.