Bibliography

American Water Works Association. (1990). Water Quality and Treatment: A Handbook of Community Water Supplies, 4th edition. San Francisco: McGraw-Hill.

American Water Works Association and the Society of Civil Engineers. (1998). Water Treatment Plant Design, 3rd edition. San Francisco: McGraw-Hill.

fecal matter animal or human excrement immunocompromised having a weakened immune system

Cryptosporidium cells, which cause cryptosporidiosis. The infection is probably via fecal-oral transmissions from kittens and puppies. Those with suppressed immune systems are susceptible to diarrhea. (©Lester V. Bergman/Corbis. Reproduced by permission.)

Chemical structure of DDT.

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