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Algae: A sourcebook for teaching about harmful algal blooms
Dubuque, IA: Kendall/Hunt.
Ants: Using biological indicators to investigate environmental conditions
Raleigh, NC: SCI-LINK/GLOBE-NET Projects, North Carolina State University; Burlington, N.C.: Carolina Biological Supply Co.
Acid rain: Grades 4-8, a sourcebook for teaching about a major environmental problem
Dubuque, Iowa: Dubuque, Iowa.
Acid rain: Grades 6-12, a sourcebook for teaching about a major environmental problem
Dubuque, Iowa: Kendall/Hunt.
Clover: Investigating the effects of tropospheric ozone
Raleigh, NC : SCI-LINK/GLOBE-NET, North Carolina State University; Burlington, NC: Carolina Biological Supply Co.