| Baldock Library | Local history lending | 942.581LET LOC | Available |
| Central Stocks Unit | Local history lending | LOC942.581LET | Available |
| Central Stocks Unit | Local history lending | LOC942.58LET | Available |
| Central Stocks Unit | Local history lending | LOC942.581 | Available |
| Central Stocks Unit | Local history lending | LOC942.581LET | Available |
| Central Stocks Unit | Local history lending | LOC942.581LET | Available |
| Central Stocks Unit | Local history lending | LOC942.581LET | Available |
| Central Stocks Unit | Local history lending | LOC942.581LET | Available |
| HALS | Local history reference | 942.581/ LET room 8County Reserve Stock | Not for loan (Set: 14 Dec 2011) |
| HALS | Local history reference | 942.581/LET/UndercroftUndercroft emergency stack | Not for loan (Set: 14 Dec 2011) |
| HALS | Local history reference | 942.581LET | Not for loan (Set: 13 Dec 2011) |
| HALS | Local history reference | 942.581/ LET ROOM 8County Reserve Stock | Not for loan (Set: 14 Dec 2011) |
| Letchworth Library | Adult non-fiction | 942.581 | Available |
| Letchworth Library | Local history lending | 942.581LET | Available |
| Letchworth Library | Local history lending | 942.581 LET | Available |
| Letchworth Library | Local history lending | 942.581LET | Available |
| Letchworth Library | Local history lending | 942.581LET Local Studies cupboard | Available |
| Letchworth Library | Local history lending | 942.581LET | Available |
| Letchworth Library | Local history lending | 942.581Local Studies cupboard | Missing copy (Set: 13 Jun 2022) |
| Letchworth Library | Local history reference | loc942.581 LET | Not for loan (Set: 14 Dec 2011) |
| Letchworth Library | Local history reference | 942.581LET LOC | Not for loan (Set: 14 Dec 2011) |
| Welwyn Garden City Library and Information Service | Local history lending | LOC 942.581 LET | Available |
| Welwyn Garden City Library and Information Service | Local history lending | LOC 942.581 LET | Available |