Fritts, H. 1977. ?Tree Rings A Record Of Climate Past?. Washington, D.C. : U.S. Department of Commerce National Oceanic and Atmospheric Environmental Data Service.

Fritts, H. 1974. ?Reconstruction Of Past Climatic Variability (A Progress Report) 1 January Through 30 June 1974?. Tucson: Laboratory of Tree-Ring Research.

Fritts, H. 1974. ?Reconstruction Of Past Climatic Variability (A Progress Report) 30 June Through 31 December 1974?. Tucson: Laboratory of Tree-Ring Research.

Fritts, H. 1973. ?Paleoclimatology?.

Fritts, H. 1966. ?Growth Rings Of Trees: Their Correlation With Climate?. Science. Science.