Acid Rain Study References

Baker, F.C. 1939. Fieldbook of Illinois Land Snails. Illinois
Natural History Survey Manual 2, Urbana.

Borror, D.J., and R.E. White. 1970. A Field Guide to
the Insects of America North of Mexico. Houghton
Mifflin Co., Boston, MA.

Hawkins, J.W., M.W. Lankester, R.A. Lautenschlager,
and F.W. Bell. 1997. Length-Biomass and energy
relationships of terrestrial gastropods in northern
forest ecosystems. Canadian Journal of Zoology
75:501–505.

Hotopp, K.P. 2002. Land snails and soil calcium in
central Appalachian Mountain forest. Southeastern
Naturalist 1:27–44.

Palmer, E.L. 1949. Fieldbook of Natural History. Mc-
Graw-Hill, New York.

Sanders, D.P. 1999. Sowbugs, Pillbugs, Millipedes and
Centipedes. Agricultural Publication G7362, University
of Missouri.

Tomlin, A.D. 1980. Earthworm Biology. Agriculture
and Agri-food Canada, London, Ontario.