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Subclass PB
| PB1-3029 | Modern languages. Celtic languages | |||
| PB1-431 | Modern languages | |||
| PB1001-3029 | Celtic languages and literature | |||
| PB1101-1200 | Goidelic. Gaelic | |||
| PB1201-1449 | Irish | |||
| PB1501-1709 | Gaelic (Scottish Gaelic, Erse) | |||
| PB1801-1867 | Manx | |||
| PB1950 | Pict | |||
| PB2001-3029 | Brittanic group | |||
| PB2101-2499 | Welsh. Cymric | |||
| PB2501-2621 | Cornish | |||
| PB2801-2932 | Breton. Armorican | |||
| PB3001-3029 | Gaulish | |||
