USE OF COLOR CHANGE OF PHENOL RED AS THE INDICATOR IN TITRATING POLIOMYELITIS VIRUS OR ITS ANTIBODY IN A TISSUE–CULTURE SYSTEM12

Abstract
JONAS E. SALK, J. S. YOUNGNER, ELSIE N. WARD; USE OF COLOR CHANGE OF PHENOL RED AS THE INDICATOR IN TITRATING POLIOMYELITIS VIRUS OR ITS ANTIBODY IN A TISSUE–C