Some info
One Web site on the subject:
http://discoveryenterprise.blogspot.com/2009/03/giovanni-schiaparelli-and-humanitys.html
This online book, The Planet Mars: A History of Observation and Discovery, By
William Sheehan (The University of Arizona Press, Tucson) has even more info:
http://www.uapress.arizona.edu/onlinebks/mars/contents.htm
