I realized that we don't actually have a thread about the British Chieftain tank.
I posted a bunch of Chieftain related stuff on my site today for anyone who is interested. The items include:
1970 article from ARMOR
1970 article from IDR - Chieftain-Main Battle tank for the 1970s
1976 article from IDR - The Combat-Improved Chieftain – First Impressions
1976 article from IDR - Improved Chieftain for Iran
WO 194-495 Assessment of Weapon System in Chieftain
WO 341-108 Automotive Branch Report on Chieftain Modifications
DEFE 15-1183 – L11 Brochure
WO 194-463 – Demonstration of Chieftain Gun
WO 194-1323 – Feasibility study on Burlington Chieftain
This shall be the general thread for all things soviet tanks. I shall start by posting an article I just wrote for my blog. I would recommend Archive Awarness which is an excellent blog about Soviet tanks and their experiences with other nation's tanks.