| RefNo | Title | Source |
| DF/ZOO/200/47/439 | Thatcher, Mrs | |
| DF/ZOO/200/154/37 | Visitors: General | |
| DF/PH/3/13/5/6 | Opening ceremony for fossil mammal gallery: Right Honorable Margaret Thatcher discussing exhibit with Dr Claringbull, Director | |
| DF/PH/3/13/5/5 | Opening ceremony for fossil mammal gallery: Right Honorable Margaret Thatcher looking at fossil mammal | |
| DF/PH/3/13/5/7 | Opening ceremony for fossil mammal gallery: Right Honorable Margaret Thatcher discussing exhibit with Dr Ball, Keeper of Palaeontology | |
| DF/PH/3/13/5/1 | Opening ceremony for fossil mammal gallery: Dr J E Smith, Chairman of Trustees, making welcome speech | |
| DF/PH/3/13/5/4 | Opening ceremony for fossil mammal gallery: Right Honorable Margaret Thatcher talking to Dr Claringbull, Director | |
| DF/PH/3/13/5/2 | Opening ceremony for fossil mammal gallery: Right Honorable Margaret Thatcher making opening speech | |
| DF/PH/3/13/5/3 | Opening ceremony for fossil mammal gallery: Right Honorable Margaret Thatcher talking to Ron Croucher | |
| DF/DIR/933/1/22/1 | Fossil Mammal Gallery, official opening by Right Hon Margaret Thatcher MP | |