title: PHOTOTUBE-TYPE INTEGRATING LIGHT RECORDERS: A SUMMARY OF PERFORMANCE OVER A FIVE-YEAR PERIOD.
authors.affiliation: U. S. PLANT, SOIL, AND NUTRITION LABORATORY, AGRICULTURAL RESEARCH ADMINISTRATION, U. S. DEPARTMENT OF AGRICULTURE, ITHACA, NEW YORK.
authors.forename: G F
authors.initials: GF
authors.lastname: Somers
authors.forename: K C
authors.initials: KC
authors.lastname: Hamner