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GENERAL NEWS  Baby Tooth Survey Launched in Search for Data on Radioactive Strontium.—Plans to collect 50,000 baby teeth a year to provide an important record of the absorption of radioactive strontium (Sr⁹⁰) by children in the St. Louis area have been made by the Greater St. Louis Citizens' Committee for Nuclear Information.Parents and children in the St. Louis area are being asked to participate in this project by mailing deciduous (baby) teeth to Baby Tooth Survey at the Committee's address, 4484 W. Pine Blvd., St. Louis 8.Since the beginning of the atomic era, Atomic Energy Commission and United States Public Health Service laboratory analyses have shown a yearly increase in the amount of Sr⁹⁰ in soil and food. Public interest in the Sr⁹⁰ problem in the St. Louis area has been sparked by reports that among five areas tested, milk from the St. Louis