1. Obituary Prof. J. C. Kapteyn, For. Mem., R.S;Crommelin;Science,1922
2. Weather cycles in the growth of big trees;Douglass;Mon. Weather Rev.,1909
3. A method of estimating rainfall by the growth of trees;Douglass;Bull. Am. Geogr. Soc.,1914
4. Climatic cycles and tree-growth;Douglass;Carne Inst. Wash.,1919
5. Evidence of climatic effects in the annual rings of trees;Douglass;Ecology,1920