Friench Simpson, “Rat Proofing a Municipal Sewer System: A Report of an Investigation to Find a Practical Method of Rat Proofing the Sewer System of San Francisco,” Public Health Reports, Vol. XXVII, No. 44 (31 Oct. 1913), pp. 2283-2289.

PDF version (printer-friendly).

For Reference:

Sewer Creature

When a video of a mysterious, slimy   “creature” living in the sewers of Raleigh, N.C., was posted on YouTube early this week, millions around the world flocked to the site to satisfy their curiosity. Since June 30, 2009, “Unknown Lifeform in North Carolina Sewer!” has been viewed more than 4.7 million times.

The mystery may have been solved. (If the ABC News article is not available, click here.)

For Reference:

Everything you ever wanted to know about crocodiles in the sewers can be found at sewergator.com.