"Grey Water Use in the Landscape" by Robert Kourik, ISBN0-9615848-1-5
Order from Metamorphic Press, PO Box 1841, Santa Rosa, CA 95402 (707)
874-2606.
The copy I have requests US$6, including S&H, but the price may have changed.
((Distributed in Australia by Tower Books, Unit 9/19 Rodborough Road,
Frenchs Forest, New South Wales, 2086.))