BLETHEN SANDRA L. 301,170 NATIONAL National Cooperative Growth Study : ten years of guidance in growth s proceedings of the National Cooperative Growth Study Ninth Annual Investigators Meeting held in New York, New York, on October 12-15, 1995 / guest ed. Sandra L. Blethen. - St. Louis, Missouri : Mosby, 1996. - 5, 62 s. : wykr. ; 28 cm (The Journal of Pediatrics, ISSN 0022-3476 ; vol. 128 suppl. to nr 5, pt.2)