title: The biological vitamin D assay of low-potency materials with special reference to the role of the mineral content of the diet.
authors.affiliation: The Food Research Laboratory, Lever Brothers & Unilever Limited, Port Sunlight.
authors.forename: N T
authors.initials: NT
authors.lastname: Gridgeman
authors.forename: H
authors.initials: H
authors.lastname: Lees
authors.forename: H
authors.initials: H
authors.lastname: Wilkinson