P. Hughes

Daily snow depth measurements from 195 stations in the United States

D. Easterling, P. Jamason, L. J. Allison, 1997 .

Effects of Recent Thermometer Changes in the Cooperative Station Network

David R. Easterling, Robert G. Quayle, Thomas R. Karl, 1991 .

United States Historical Climatology Network (US HCN) monthly temperature and precipitation data

David R. Easterling, T. A. Boden, D. Easterling, 1996 .