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