| Abbreviation | Definition |
|---|---|
| BGML | Bishop Grady Memorial Library |
| BHFL | Bedford Hills Free Library |
| BHL | Biodiversity Heritage Library |
| BHM | Bulletin of the History of Medicine |
| BHPL | Benton Harbor Public Library |
| BHPL | Berkeley Heights Public Library |
| BHPL | Beverly Hills Public Library |
| BHPL | Blue Hill Public Library |
| BI | Bibliographic Instruction |
| BIDL | Beaver Island District Library |
| BIDL | Bulgarian Iconographical Digital Library |
| BIO | BIOgraphy |
| BiochemPharmacol | Biochemical Pharmacology (Oxford) |
| BiomedBiochimActa | Biomedica Biochimica Acta (Berlin) |
| BJL | Bodleian Japanese Library |
| BJRL | Bulletin of the John Rylands Library |
| BL | British Library |
| BLA | Botswana Library Association |
| BLAA | Biblioteca Luis ??ngel Arango |
| BLAA | Biblioteca Luis Ángel Arango |