title: RELATION OF SULPHUR DIOXIDE IN THE ATMOSPHERE TO PHOTOSYNTHESIS AND RESPIRATION OF ALFALFA.
authors.affiliation: Department of Agricultural Research, American Smelting and Refining Company, Salt Lake City, Utah.
authors.forename: M D
authors.initials: MD
authors.lastname: Thomas
authors.forename: G R
authors.initials: GR
authors.lastname: Hill