Hesselman, H.
- A.C. Cline Correspondence: Duffield, J.W.. 1934-1940
- A.C. Cline Correspondence: Holsoe, T.. 1932-1941
- A.C. Cline Correspondence: Merrill, E.D.. 1935-1944
- Correspondence between P.R. Gast and R.T. Fisher on future of Harvard Forest. 1929-1930
- R.T. Fisher Correspondence: International Education Board. 1924-1927
- R.T. Fisher Correspondence: National Research Council. 1928-1934
- R.T. Fisher Correspondence: Romell, L.G.. 1931-1932