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Kittel, T.G.F., N.A. Rosenbloom, C. Kaufman, J.A. Royle, C. Daly, H.H. Fisher, W.P. Gibson, et al. “VEMAP 2: U.S. Daily Climate, 1895-1993.” ORNL Distributed Active Archive Center, January 1, 2001. doi:10.3334/ORNLDAAC/620. Date Accessed: 2026-02-17
Kittel, T. G. F., et al. VEMAP 2: U.S. Daily Climate, 1895-1993. 1, ORNL Distributed Active Archive Center, 1 Jan. 2001, doi:10.3334/ORNLDAAC/620. Date Accessed: 2026-02-17