title: EFFECT OF COPPER AND ZINC DEFICIENCIES ON THE PHOTOSYNTHETIC ACTIVITY OF OF THE FOLIAGE OF YOUNG TUNG TREES.
authors.affiliation: U. S. FIELD LABORATORY FOR TUNG INVESTIGATIONS, GAINESVILLE, FLORIDA.
authors.forename: A J
authors.initials: AJ
authors.lastname: Loustalot
authors.forename: F W
authors.initials: FW
authors.lastname: Burrows
authors.forename: S G
authors.initials: SG
authors.lastname: Gilbert
authors.forename: A
authors.initials: A
authors.lastname: Nason