(1978). The 3-F erosion bridge: A new tool for measuring soil erosion / Gerald E. Ranger and Franklin F. Frank.
Cita Chicago (17th ed.)The 3-F Erosion Bridge: A New Tool for Measuring Soil Erosion / Gerald E. Ranger and Franklin F. Frank. 1978.
Cita MLA (9th ed.)The 3-F Erosion Bridge: A New Tool for Measuring Soil Erosion / Gerald E. Ranger and Franklin F. Frank. 1978.
Atenció: Aquestes cites poden no estar 100% correctes.