C. E. Clapp

2 books • 2 series

Nov 2, 2015
Cover of Humic Substances and Chemical Contaminants

Humic Substances and Chemical Contaminants (ACSESS Books)

Mar 2001
Cover of Plant Growth Stimulation by Humic Substances and Their Complexes with Iron

Plant Growth Stimulation by Humic Substances and Their Complexes with Iron (Proceedings of the International Fertiliser Society, #470)