Byrd, E. Oliver. Health, level eight / Oliver E. Byrd, Elizabeth A. Neilson and Virgina D. Moore. - 3rd ed. - California : Laidlaw brothers publishing, c 1970. - 288 p. : ill. ; 23 cm. - Laidlaw health series. . 300 300 Subjects--Topical Terms: Health education. Promotion of health. Dewey Class. No.: 613 / B996h