Langbein، W.B.؛ Iseri، Kathleen T. (1995). "Hydrologic Definitions: Stream". Manual of Hydrology: Part 1. General Surface-Water Techniques (Water Supply Paper 1541-A). Reston, VA: USGS. مؤرشف من الأصل في 2012-05-09.
Langbein، W.B.؛ Iseri، Kathleen T. (1995). "Hydrologic Definitions: Stream". Manual of Hydrology: Part 1. General Surface-Water Techniques (Water Supply Paper 1541-A). Reston, VA: USGS. مؤرشف من الأصل في 2012-05-09.