Kokyu to junkan

Articles in SafetyLit
Y-Axis = Volume :: X-Axis = Issue
?=unknown status :: X=no issue published :: nn=articles from issue :: A=relevant article(s) IDed to add
S=searched, nothing relevant :: O=issue published but not yet searched :: C=combination issue

	2	3	8	10	11

20 (1972)	?	?	?	2	?
21 (1973)	?	?	1	?	1
22 (1974)	1	?	?	?	?
35 (1987)	?	?	1	?	?
38 (1990)	?	1	?	?	?
45 (1997)	1	?	?	?	?
57 (2009)	?	?	1	?	?