Vigil Network Submission 3 August 1970
POTLOCONA CREEK VALLEY, Yazoo Watershed, Mississippi, U.S.A.
Map of watershed and sedimentation ranges P-2 and P-4 (base from county road maps)
Airphotos showing sedimentation ranges P-2 and P-4 (2 photos)
Xerox copies of notebook pages showing range end locations, Ranges P-2 and P-4 (2 sheets)
Print of valley cross-sections (1970 plotting)