Transportation research part A: general

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

13 (1979)	1	?	?	?	?	?
15 (1981)	?	?	?	?	1	?
16 (1982)	?	?	2	?	?	?
17 (1983)	1	1	?	2	?	?
18 (1984)	2	?	?	1	2	C
19 (1985)	?	?	1	1	1	C
20 (1986)	?	?	?	2	?	1
21 (1987)	?	?	?	?	?	1
22 (1988)	?	1	?	?	?	?
23 (1989)	1	?	?	1	?	?
24 (1990)	?	1	?	?	?	?
25 (1991)	?	1	C	?	?	?