Transportation quarterly

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

36 (1982)	?	?	1	3
37 (1983)	2	?	1	2
38 (1984)	1	?	1	3
39 (1985)	4	?	1	2
40 (1986)	?	?	1	1
41 (1987)	?	5	1	1
42 (1988)	2	2	1	1
43 (1989)	1	?	1	1
44 (1990)	4	1	?	4
45 (1991)	1	1	5	2
46 (1992)	3	?	?	?
47 (1993)	3	1	3	3
48 (1994)	3	?	2	1
49 (1995)	1	1	1	1
50 (1996)	1	1	3	?
51 (1997)	2	?	?	2
52 (1998)	3	2	?	?
53 (1999)	2	1	4	2
54 (2000)	1	?	2	?
55 (2001)	2	1	?	2
56 (2002)	?	?	1	4
57 (2003)	?	2	1	2