There's a paper by Alan Robock titled "Internally and Externally Caused Climate Change", published in the journal of the American Meteorology Society in June 19

There's a paper by Alan Robock titled "Internally and Externally Caused Climate Change", published in the journal of the American Meteorology Society in June 1978, and an earlier paper, "Climate Change Over the Polar Ocean" by Vowinckel and Orvig, published in Meteorology in January 1966, and, best yet, an even earlier paper, "The Carbon Dioxide Theory of Climatic Change", by Plass, published by Johns Hopkins University ca 1955 and funded by the US Office of Naval Research. The latter paper can be read here: http://onlinelibrary.wiley.com/doi/10.1111/j.2153-3490.1956.tb01206.x/abstract http://onlinelibrary.wiley.com/doi/10.1111/j.2153-3490.1956.... (there is a "get pdf" link on the right.)