$ ./analyse_data.py -i data/bibdata/set_a/set_a.mrc
Key error (linkage): 11035104 111-01 880-01
No 880 fields: 7742007
Finished processing 64 records
Datafram contains data from 63 records
$
$ ./analyse_data.py -i data/bibdata/set_b/set_b.mrc
Key error (linkage): 13570165 250-00 880-00
Key error (linkage): 13567620 250-03 880-03
Key error (linkage): 13567620 264-04 880-04
Finished processing 102 records
Datafram contains data from 102 records