[HYGIENIC PROBLEMS IN THE EDUCATIONAL SYSTEM FOR STUDENTS IN SHIFT SCHOOLS].
D000293:Adolescent; D002648:Child; D006801:Humans; D012572:School Health Services; D012574:Schools; D013334:Students; D014586:USSR
ADOLESCENCE; CHILD; SCHOOL HEALTH; USSR
GIGIENICHESKIE VOPROSY REZHIMA OBUCHENIIA UCHASHCHIKHSIA V SMENNYKH SHKOLAKH RABOCHE I MOLODEZHI.