Literature compass

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

	1	2	3	4	5	6	11

4 (2007)	5	?	4	2	1	2	?
5 (2008)	3	3	7	3	1	2	?
6 (2009)	?	?	?	1	?	?	?
14 (2017)	?	?	?	?	?	?	1