A study of the periodicity of seed years and direction of seed distribution of the white pine in the vicinity of Ithaca, N. Y Graham, Samuel A. (Samuel Alexander), 1891-1967 creator text book Ithaca, N. Y 1915 1915
print
ENG "An investigation undertaken as minor work for the degree of Master in Forestry." Forests and forestry Seeds White pine https://www.biodiversitylibrary.org/bibliography/55823 63330020 10.5962/bhl.title.55823 NIC