Irwin, H R Microfluorometric screening technic for phenylketonurias using filter paper sample collection. [electronic resource] - American journal of clinical pathology Mar 1967 - 401-3 p. digital Publication Type: Journal Article ISSN: 0002-9173 Subjects--Topical Terms: FluorometryHumansInfant, NewbornMicrochemistryPhenylketonurias--blood