1 Research Institute of Petroleum Exploration and Development, Petro China, Beijing, China 2 Southwest Oilfield Company, Petro China, Chengdu, China The Ediacaran Dengying Formation in the Sichuan ...

The politics of the non-aligned Left of the years 1956–1962 have become fashionable of late. Two at least of the writers who were prominent in the journals of the time have published memoirs, and at ...