Co-operation between R.A.F. and Dominion air forces (including R.C.A.F.) Unit ID: 202/8144/2–123. AJCP Reel No: 5118
Cooperation of Dominions: part played by naval and air forces in the Battle of the Atlantic, defence expenditure of the four Dominions Unit ID: 1207/W.G. 503/5–8. AJCP Reel No: 5658
Cooperation of the Dominions in the work of the Committee of Imperial Defence, 1929 Unit ID: 147. AJCP Reel No: 6814 Date: 1929
Co-operative organisation: Colonial Development Fund grant for salary of expert advisor Unit ID: 499/N. 1026A. AJCP Reel No: 5362–5363
Co-operative organisation of industries in Newfoundland and Labrador: reform of the truck system Unit ID: 499/N. 1026/1–9. AJCP Reel No: 5362
Co-ordination of air training programmes: agenda and plans for participating in Ottawa Conference, April 1942-May 1942 Unit ID: 1084/WT. 284/11/7–21. AJCP Reel No: 5592 Date: 1942-04/1942-05
Co-ordination of air training programmes in Canada and U.S.A, February 1942-May 1942 Unit ID: 1084/WT. 284/11/1–5. AJCP Reel No: 5592 Date: 1942-02/1942-05
Co-ordination of defence schemes in Central and East Africa: interchange of military personnel Unit ID: 187/7040B/12–46. AJCP Reel No: 5111
Co-ordination of war-time records on scientific research and development Unit ID: 2050/W.T. 601/26. AJCP Reel No: 5701
Co-ordination with Australia and New Zealand on British defence committee in South-East Asia Unit ID: 1732/W.G. 773/19/14. AJCP Reel No: 5690