- 宗卷PTA - Polytechnic Touring Association
- 系列PTA/2 - Publications
- 次系列PTA/2/1 - Tour brochures
- 36 more...
- PTA/2/1/37 - Poly Holiday News
- PTA/2/1/38 - Polytechnic Tours By Air 1938
- PTA/2/1/39 - Poly Holidays 1954
- PTA/2/1/40 - The Travel Trust: Poly Super-Jet Holidays 1967
- PTA/2/1/41 - Polytechnic Holidays in Britain 1945 brochure
- PTA/2/1/42 - The Travel Trust: Lunn Poly Sunshine Ski-ing 71/72
- PTA/2/1/43 - Poly Holiday News
- PTA/2/1/44 - Poly Holidays 1959 in Europe and America
- PTA/2/1/45 - Facts and Figures 1959
- 18 more...