Geological phases of soil erosion investigation and control in Nebraska,
Condra, Geo. E. 1869-1958.
Geological phases of soil erosion investigation and control in Nebraska, by G. E. Condra. 1934. - [Lincoln] Printed by authority of the state of Nebraska, 1934. - 22 p. illus.
Cover title.
gs 35000087
Soils--Nebraska.
Erosion.
QE135 / .A43 no. 6
Geological phases of soil erosion investigation and control in Nebraska, by G. E. Condra. 1934. - [Lincoln] Printed by authority of the state of Nebraska, 1934. - 22 p. illus.
Cover title.
gs 35000087
Soils--Nebraska.
Erosion.
QE135 / .A43 no. 6