OR: Operational research quarterly (1953)
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
 |  |  |  |  |  | 
| 4 (1953) | ? | 3 | 1 | ? | 2 | 
| 5 (1954) | ? | 1 | 1 | 1 | 2 | 
| 6 (1955) | ? | ? | 2 | 1 | ? | 
| 7 (1956) | ? | ? | 1 | 4 | ? | 
| 8 (1957) | ? | 1 | 1 | 2 | ? | 
| 9 (1958) | ? | 4 | 1 | 1 | 2 | 
| 10 (1959) | ? | ? | ? | ? | 1 | 
| 11 (1960) | ? | ? | ? | 1 | ? | 
| 13 (1962) | ? | 1 | 1 | ? | ? | 
| 14 (1963) | ? | 1 | 1 | ? | 2 | 
| 15 (1964) | ? | 2 | ? | ? | ? | 
| 16 (1965) | ? | ? | ? | ? | 1 | 
| 17 (1966) | ? | ? | ? | 4 | 2 | 
| 18 (1967) | ? | ? | 2 | ? | ? | 
| 19 (1968) | 1 | 1 | 3 | 1 | ? |