Bibliography

Patterson, D.J. 1996. Free Living Freshwater Protozoa: A Color Guide. Manson Publishing NY.

• The Vorticella is found as figure 231
• The Mayorella is found as figure 192
• The Lacrymaria is found as figure 301

Smith, Douglas. 2001. Pennak's Freshwater Invertebrates of the United States. John Wiley and Sons NY.

• Used to identify organisms not shown in pictures.