teacher.scholastic.com

http://www.ponds.org/preventinglakeshorelineerosion.html

http://passel.unl.edu/pages/informationmodule.php?idinformationmodule=1086025423&topicorder=4&maxto=7

www.erosionpolution.com

popularmechanics.com

pumpstoreusa.com

http://homeguides.sfgate.com/methods-stopping-soil-erosion-sloped-lot-44640.html