F.C.C. STUDY URGED OF TV CEREAL ADS
Prof J Mayer urges that FCC appt special com of nutritionists, drs and educators to monitor cereal indus TV ad aimed at children, lr to Moss; Moss backs proposal; says he has requested FTC probe; Prof M Latham calls for ad curbs, subcom hearing; lauds Choate's research; says his rating of cereals is unorthodox but not inaccurate; Choate charges cereal cos instructed reprs not to discuss TV ad at hearing; Cereal Inst exec dir Hayden denies charge
