21. Cellar Holes of Pirate Valley, Sherman Hill, Swift River, Harvard Forest and Vicinity Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: 1907–2014 Institution: Harvard Forest Archives
22. Clarence C. Harris Land Creator: Larson, C. H. Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: November 7, 1951 Institution: Harvard Forest Archives
23. Compartments on Prospect Hill - 2008 Creator: Hall, B. Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: July 14, 2008 Institution: Harvard Forest Archives
24. Composite of USGS Topographic Maps of Petersham ('Natural Resource Inventory') Creator: United States. Soil Conservation Service Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: November 1973 Institution: Harvard Forest Archives
25. Conservation Easements in the Town of Petersham Creator: Gould, E. M.; Lyford, Walter Henry, 1909- Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: 1974–2014 Institution: Harvard Forest Archives
26. Estate of Nathan Matthews Hamilton Mass Creator: Cline, A. C.; Harvard Forest (Research facility) Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: April 1923 Institution: Harvard Forest Archives
27. Experimental reproduction cuttings, Adams-Fay Lot (TS IX) Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: [1924?] Institution: Harvard Forest Archives
28. Experimental reproduction cuttings, Adams-Fay Lot (TS IX) Creator: Cline, A. C. Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: 1924 Institution: Harvard Forest Archives
29. Federation of Women's Clubs State Forest Creator: Bowers, F.; Hall, F. G. Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: August 1931–May 1933 Institution: Harvard Forest Archives
30. Fire Ponds of Petersham Creator: Gould, E. M. Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: 1970–2014 Institution: Harvard Forest Archives
31. Forest Operations 1962-1963, Prospect Hill Creator: Spurr, Stephen H., 1918-1990 Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: 1963 Institution: Harvard Forest Archives
32. Forest operations, Tom Swamp I, 1909-1956 Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: [ca. 1956] Institution: Harvard Forest Archives
33. Forest operations, Tom Swamp North Creator: Foster, D. R. Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: 1990 Institution: Harvard Forest Archives
34. Forest operations, Tom Swamp South Creator: Foster, D. R. Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: 1990 Institution: Harvard Forest Archives
35. Forest Type, Size, and Stocking Map of the Federation Forest Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: 1931 Institution: Harvard Forest Archives
36. Glacial Geology and Topography of Black Rock Forest Creator: Denny, Charles Storrow, 1911- Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: 1937 Institution: Harvard Forest Archives
37. Glacial Geology and Topography of Black Rock Forest - revised 1982 Creator: Scholz, H. F., Karnig, Jack J., and Denny, Charles Storrow, 1911- Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: July 1982 Institution: Harvard Forest Archives
38. Growth and Density Plan of the Black Rock Forest Creator: Tryon, H. H. Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: 1930 Institution: Harvard Forest Archives
39. Harvard Black Rock Forest - Trail Map Creator: Halpin, P. N.; Karnig, Jack J. Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: January 1967 Institution: Harvard Forest Archives
40. Harvard Black Rock Forest 1951 Creator: Stout, B. B. Format: Maps/Atlases Collection: The Harvard Forest Map Collection Date: July 1951 Institution: Harvard Forest Archives