ESTIMATE OF INFINITY y» DOSE FROM GUMMED FILM STATION #309. LOCATION____ BILLINGS, MONTANA . Jan. 0.0 0.1% 0.2" 0.2 Feb. a el 12 3 March .0 4 14 05 April 62 1.6 18% 2.1 2.5 1.9 9.8 2.9 # 1.3 1.9 3.4 June 7 .o% 1.5 July 5 6% 2.3 Aug, 5 6% 2.3 2.9 Sept. 3 «3% 1.2 2.0 Oct. 2 wl 6 2.4 Nov, 3 wa 4 3 Deo, 0 4 4 A 4.9 8.2 10.7 TOTAL Best 8.3 3.6 20.0 Best. 0.3 0.9 Feb, 12 4 March 7 1.5 Pre-1954 Tl April 2.7 2.3 1954 4.9 May 2.0 42 1955 8.1 June 1.8 1.8 1956 10.7 July 1.2 .6 1957 20.0 Aug. 1.2 3 1958 15.7 8 ol 1959 12.3 Det, 2.8 od Nov. 1.5 od Dec. 26 0 15.7, 12.3 Sept, TOTAL 3S «2» ww wh ok @ ££ Total 2 @ «»« © eee Jan, 79 ik 2&2 ' kk & OE per agery May GZ Best