Permanence and durability of library catalog cards a study conducted by W. J. Barrow for the Library Technology Project.
| Awdur Corfforaethol: | |
|---|---|
| Fformat: | Llyfr | 
| Iaith: | English | 
| Cyhoeddwyd: | Chicago
        
        [1961] | 
| Cyfres: | LTP publications
              no. 3 | 
| Pynciau: |