A study of the chemistry of the 1928 Pennsylvania tobacco crop Longenecker, Joseph Bender. creator text book 1930 1930
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ENG Thesis (M.S.)--Pennsylvania State College. Pennsylvania Tobacco Pennsylvania agricultural literature on microfilm USAIN state and local literature preservation project, Pennsylvania https://www.biodiversitylibrary.org/bibliography/44184 38092146 10.5962/bhl.title.44184