[pct-l] Giardia Lamblia - Excellent informative article by Robert L. Rockwell, Phd

[Ken Murray]

"I recall reading within the last few years another article on wilderness 
water. One point I remember is that especially in the afternoon the top few 
inches of water in lakes has been disinfected by the UV from the sun. 
Anyone else recall this?

Tortoise"

Yes, this was written by Robert Derlet, MD, an ER physician of UC Davis, 
my alma mater.

I think this is it:

http://www.pcta.org/help/join/magazines/SierraWater.asp