1. “Oxides” are taken to include hydroxides and oxyhydroxides.
2. Iron oxides;Schwertmann,1977
3. Magnetic susceptibility of the soil and its significance in soil science—a review;Mullins;J. Soil Sci.,1977
4. R.W. Fitzpatrick, The occurrence and pedogenic significance of Fe-oxides in soils of the southern hemisphere, in: Iron in Soils and Clay Minerals, J.W. Stucki and B.A. Goodman, eds., Reidel, in press.
5. Über das Vorkommen und die Entstehung von Maghemit in norddeutschen Böden;Schwertmann;Neues Jahrb. Mineral. Monatsh.,1959