Eliud,
Here are the missions that I have in the database for Arthur P. Hafner.
date aircraft pilot position
8/25/44 42-39997 (VP-T) Morton Tolchinsky gunner(tail)
9/1/44 42-97059 (VP-S) David Gardner gunner(W)
9/8/44 42-97059 (VP-S) David Gardner gunner(W)
9/9/44 42-97059 (VP-S) David Gardner gunner(tail)
9/17/44 42-39997 (VP-T) Nelson Schein gunner(tail)
9/21/44 42-97882 (VP-K) David Gardner gunner(W)
9/22/44 42-97882 (VP-K) David Gardner gunner(W)
9/25/44 42-97357 (VP-Z) David Gardner gunner(W)
9/27/44 43-37560 (VP-R) David Gardner gunner(W)
10/7/44 42-31614 (VP-L) Robert Roush gunner(W)
10/15/44 42-39997 (VP-T) Robert Roush gunner(W)
10/19/44 43-37561 (VP-J) Robert Roush gunner(W)
10/25/44 42-31761 (VP-O) Robert Roush gunner(W)
10/28/44 42-31761 (VP-O) Robert Roush gunner(W)
10/30/44 42-97589 (VP-Y) Robert Roush gunner(W)
11/5/44 42-31761 (VP-O) Robert Roush gunner(W)
11/6/44 42-40017 (MS-W) Robert Roush gunner(W)
11/9/44 43-37791 (VP-V) Robert Roush gunner(W)
11/21/44 42-31761 (VP-O) Robert Roush gunner(W)
11/25/44 43-37561 (VP-J) Robert Roush gunner(W)
12/4/44 43-37777 Robert Roush gunner(W)
12/9/44 44-6478 (VP-W) Robert Roush gunner(W)
1/1/45 43-38983 (VP-S) Robert Roush gunner(W)
1/3/45 43-38983 (VP-S) Robert Roush gunner(W)
1/8/45 43-38983 (VP-S) Robert Roush gunner(W)
1/10/45 xxxx495 Robert Roush gunner(W)
I can not guarantee that I have all of his missions. It is at least a start.