@article{159206, recid = {159206}, title = {Homestudy course 3015-G, environmental protection.}, publisher = {Center for Professional Development and Training, U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control,}, address = {[Atlanta, Ga.?] :}, pages = {11 v. :}, year = {1983}, note = {Cover title.}, url = {http://library.usi.edu/record/159206}, }