Picture Bibliography
http://naturalpatriot.org/wp-content/uploads/2007/05/rachel_carson.jpg
http://www.anncottrellfree.org/images/8.jpg
http://history.sandiego.edu/gen/nature/images/PDRM1402.jpg
www.tc.umn.edu/.../pestcide/sim/carson-p.jpg
http://www.tc.umn.edu/~allch001/1815/pestcide/sim/carson-p.jpg
http://history.sandiego.edu/gen/nature/images/PDRM1402.jpg
http://media-2.web.britannica.com/eb-media/09/99909-004.jpg