Botanical and Geological Survey
The Marriner S. Eccles Document Collection
Appendix A to minutes of the eleventh meeting of Joint Economic Committees of Canada and the United States. Prepared by Harvard professor Hugh M. Raup with support from Charles S. Denny of Wesleyan University.
Raup, Hugh M., 1943, Botanical and Geological Survey, from The Marriner S. Eccles Document Collection, accessed Apr 19, 2014 from FRASER, http://fraser.stlouisfed.org/docs/historical/eccles/039_10_0004.pdf