Blum, Winfried E. H.: Essentials of soil science: soil formation, functions, use and classification (World Reference Base, WRB) / Winfried E. H. Blum, Peter Schad, Stephen Nortcliff . – Stuttgart : Borntraeger Science Publishers, 2018
Blum, Winfried E. H.: Essentials of soil science: soil formation, functions, use and classification (World Reference Base, WRB) / Winfried E. H. Blum, Peter Schad, Stephen Nortcliff . – Stuttgart : Borntraeger Science Publishers, 2018