Amerykański gleboznawca - mineralogia gleb.

Soil color : proceedings of a symposium sponsored by Divisions S-5 and S-9 of the Soil Science Society of America in San Antonio, Texas, 21-26 Oct. 1990 / editors J. M. Bigham and E. J. Ciolkosz. - Repr. - Madison, 1997. S. XI (Department of Agronomy, The Ohio State University, Columbus, Ohio)

LCA online (Bigham, J. M.)

http://snr.osu.edu/fac_staff/cv/bigham.html