CNRS Emeritus Research Director, University of Toulouse, France

James Hutton Institute

CNRS Emeritus Research Director, Toulouse University

Professeur de Chimie Université de Paris

Southern Illinois University - Edwardsville

Professor of Soil Chemistry & Environmental Microbiology, University of Alberta

Watershed Sciences, Utah State University

Prof. & Scientist, Spanish CSIC, retired, IRNASa, Salamanca (SPAIN)

Professor, Indiana University

Xiamen University