Gasser, J. K. R. and Mitchell, J. D. D. 1968. Effects of previous cropping and fertilizer-N applied in field experiments on soil-N available to ryegrass grown in pots . International congress of soil science. 9 (2), pp. 449-458.
Schofield, R. K. 1938. Pore-size distribution as revealed by the dependence of suction (pF) on moisture content. International congress of soil science. 1, pp. 38-45.
MacEwan, D. M. C 1950. Solvation of clay minerals in relation to crystal structure: inter-lamellar adsorption by clay minerals. International congress of soil science. 1, pp. 107-109.
Schofield, R. K. and Costa, J. V. B. 1935. The determination of the pF at permanent wilting and at the moisture equivalent by the freezing point method. International congress of soil science. 3 (1), p. 6.
Emerson, W. W. 1954. The effect of various grasses and lucerne on the cohesion of soil crumbs. International congress of soil science. 5 (2), pp. 65-68.
Page, H. J. 1926. The investigations of KK Gedroiz on base exchange and absorption A resume. International congress of soil science. 2 (A), pp. 208-231.
Thornton, H. G. 1935. The symbiotic relationship between soil bacteria and higher plants, as exemplified by the Leguminosae. International congress of soil science. 3.