AU - Sagan LA TI - Environment, technology, and health: Human ecology in historical perspective PT - JOUR DP - 1979 TA - JAMA pages = {2315}, VI - 241 IP - 21 AID - 10.1001/jama.1979.03290470063036 [doi] 4100 - http://dx.doi.org/10.1001/jama.1979.03290470063036 SO - JAMA May 25, 1979 241(21):2315