Cornell University Library Digital Collections
- MacDougall, Robert D. (Robert Duncan), 1940-1987 28
- MacDougall, Robert D. (Robert Duncan), 1940-198712
- Herath, Bandara2
- Staffeld, William2
- Forest Department, Ministry of Environment and Natural Resources, Government of Sri Lanka1
- MacDougall, Bonnie G. (Bonnie Graham), 1941-20171
