1. Chf., Soils Div., U. S. Army Engr. Waterways Experiment Sta., Vicksburg, Miss.
2. Chf. Regional Studies Sec., Geology Branch, Soils Div., U. S. Army Engr. Waterways Experiment Sta., Vicksburg, Miss.
3. Engr., Geology, Soils and Materials Branch, Mississippi River Comm., Vicksburg, Miss.