Vigil Network Submission 24 July 1970
LONG CREEK VALLEY, Yazoo Watershed, Mississippi, U.S.A.
Map of watersheds & sedimentation ranges (base reduced from USGS topographic maps)
Airphotos showing range locations (6 photos)
Xerox copies of notebook pages showing sketches of range ends (6 sheets)
Prints of valley cross sections (2 sheets)