The Adventures of Herman
www.urbanext.uiuc.edu/worms
Northern Plains Agricultural Research Laboratory
www.sidney.ars.usda.gov
Soil by Karen Bryant-Mole
It’s Easy to Have a Worm Visit With You by Caroline O’Hagar
Squirmy Wormy Composters by Bobbie Kalman and Janine Schaub
Earthworms by Terry Jennings
Compost Critters by Bianca Laries
Soil Conservation by Norman Hudson
McGraw Hill Science Textbook
Soils Science Kit distributed by National Science Resources Center
