Johnston Journal of Nuclear Energy Volume 19, Issue 7,  pp 527-539, 1965 Table 2
239Pu sample 4
TIME	BETA	ERR	GAMMA	ERR	TOTAL	ERR
(DAYS)	MICROWATTS	PERCENT	MICROWATTS	PERCENT	MICROWATTS	PERCENT
53	243	10	278	19	521	16
61	233	9	229	16	462	14
74	199	8	186	13	385	12
96	169	7	134	9	303	9
124	137	5	111	8	248	7