The European Digital Archive of Soil maps: The Soil Maps of Africa Senthil Selvaradjou and Luca Montanarella EUROPEAN COMMISSION JOINT RESEARCH CENTRE.
CTS2 Terminology Services Harold Solbrig Mayo Clinic.
1 “DERIVATIONS AND RELATED MAPS” by Dr. M. S. Samman Dr. A. B. Thaheem.
CTS2 Terminology Services
