THE INFLUENCE OF DIETARY PTEROYLGLUTAMIC ACID AND OF APA LIVER EXTRACT ON THE SURVIVAL AND GROWTH OF THE NEMATODE, ASCARIDIA GALLI, IN CHICKENS FED PURIFIED AND NATURAL DIETS1

Abstract
ELVIO H. SADUN, CECELIA K. KEITH, MARGARET J. PANKEY, JOHN R. TOTTER; THE INFLUENCE OF DIETARY PTEROYLGLUTAMIC ACID AND OF APA LIVER EXTRACT ON THE SURVIVAL AN