WMO Report 1977: Kellogg, William W. "Effects of Human Activities on Global Climate. A summery, with consideration of the implication of a possibly warmer Earth", WMO Technical Note 156. Geneva: World Meteorological Organization.
Graph: Estimates of past and future variations of global mean temperature 1850-2050 (p. 24 in WMO Report 1977, and republished many times in Kellogg’s later publications):
Popular article: Kellogg, William W. 1978: "Is mankind warming the earth?". In: Bulletin of Atomic Scientists 34:2 (February 1978), pp. 10-19.
