Watson, K.K.. An instantaneous profile method for determining the hydraulic conductivity of unsaturated porous materials. Water Resources Research. 1966, 2 (4): 709–715. Bibcode:1966WRR.....2..709W. doi:10.1029/WR002i004p00709.
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Watson, K.K.. An instantaneous profile method for determining the hydraulic conductivity of unsaturated porous materials. Water Resources Research. 1966, 2 (4): 709–715. Bibcode:1966WRR.....2..709W. doi:10.1029/WR002i004p00709.