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- Publication:
- , 1920
- Publication:
- [United States] , 1920
- Publication:
- [192-]
- Publication:
- [192-]
- Publication:
- [ca. 192-]
- Publication:
- [Russia : s.n., 192-]
- Subject(s):
- Schools, Medical
- Author(s):
- National Child Labor Committee (U.S.) author.
- Publication:
- [Nashville] : Tennessee Department of Public Instruction, 1920
- Subject(s):
- Child Welfare
Child Health
Child Labor
Tennessee
- Author(s):
- McCollum, Elmer Verner, 1879-1967
- Publication:
- New York : The Macmillan Company, 1920
- Subject(s):
- Chemistry, Organic
Organic Chemistry Phenomena
- Author(s):
- Lincoln, Azariah T. (Azariah Thomas), 1868-1958 author
- Publication:
- Boston : D.C. Heath & Co., [1920]
- Subject(s):
- Chemistry, Physical
