title: PHOTOPERIODIC RESPONSE OF CERTAIN LONG AND SHORT DAY PLANTS TO FILTERED RADIATION APPLIED AS A SUPPLEMENT TO DAYLIGHT.
authors.affiliation: Purdue University Agricultural Experiment Station, West Lafayette, Indiana.
authors.forename: R B
authors.initials: RB
authors.lastname: Withrow
authors.forename: J P
authors.initials: JP
authors.lastname: Biebel