Purchase DIFCO R2A Agar , Raka-Ray No 3 Medium , Rappaport Vassiliadis MSRV , Rappaport-Vassilidas R10 Broth , Regan-Lowe Charcoal Agar , Reinforced Clostridial , Riboflavin Assay Medium , Rice Extract Agar , Rogosa Sl Agar , Rogosa Sl Broth , Rose Bengal Agar Base , RVP Broth , RVP Medium