TY  - RPRT
TI  - Reconstructing late Cenozoic stream gradients from high-level chert gravels in central Eastern Kansas
AU  - J.W. Harbaugh
AU  - D. F. Merriam
AU  - H.H. Howard
PY  - 2007
UR  - https://pubs.usgs.gov/publication/70031279
ID  - 70031279
ER  -