Spaeth, J. Nelson
- A.C. Cline Correspondence: Duffield, J.W.. 1934-1940
- A.C. Cline Correspondence: Johnston, J.W., Jr.. 1933-1951
- A.C. Cline Correspondence: Spaeth, J. Nelson. 1938-1940
- Control plot, PH I. 1921
- Harvard Forest Meadow-Water Tract Forest Operations 1920. 1920
- Harvard Forest Slab City Tract Forest Operations 1910-1919. 1910-1919
- Inheritance of white pine growth factors (formerly Exp. 24-1, Active Research files). 1924
- Map of Land Sold by President and Fellows of Harvard to R.T. Fisher. 1920
- Meadow-Water Tract - Type map of Tom Swamp I-VIII. 1919
- Prospect Hill Forest Operations. 1920
- Prospect Hill Stand and Plantation map - 1919. 1919
- R.T. Fisher Correspondence: Broderick, D.C.. 1921
- R.T. Fisher Correspondence: Lowell, A.L.. 1909-1933
- R.T. Fisher Correspondence: Society of American Foresters. 1918-1934
- R.T. Fisher Correspondence: USDA Forest Service. 1909-1934
- Rough Survey of Portions of Mr. William Simes' Mann and Martin Lots and Land of Adjoining Owners. 1922
- Rough Survey of Portions of Mr. William Simes' Mann and Martin Lots and Land of Adjoining Owners. 1922
- Rough Survey of Portions of Mr. William Simes' Marsh and Martin Lots and Land of Adjoining Owners. 1922
- Sample plot, PH I. 1921
- Stump poisoning experiment. 1926
- Working plan for the Harvard Forest based on 15 years of data. 1923