Geological Investigation of the Alluvial Valley of the Lower Mississippi River
Harold N. Fisk's 1944 monumental tome on nature at its most mundane and sublime is, amazingly, available online and free. Landscape architects in every specialty have much to glean from it, not the least of which are water engineering techniques, ecological and geological processes, graphic representation, and the ideological and philosophical implications of reconstructing the Mississippi River.
The maps, scanned at high resolution and full scale, are some of the most beautiful I've seen.
The following files are hosted by the U.S. Army Corps of Engineers.
