A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. Courtesy of the author & The Karst Waters Institute. 2002.
laboratory coefficient of permeability — , standard coefficient of permeability Permeability defined for controlled temperature conditions (60NF) as gallons per day per square foot (gpd/ft2) under a unit gradient [16]. See also Meinzer unit … Lexicon of Cave and Karst Terminology
Leica R8 — The Leica R8 is a manual focus 35 mm single lens reflex camera produced by the German firm of Leica as part of their R series of cameras. Development began in 1990:cite web|url=http://www.imx.nl/photosite/leica/rseries/designr8e.html|title=Leica… … Wikipedia
