na INLIS000000000002701 Ind 0010-1118002701 Classification problems of selected soil profiles from North Sumatra (Indonesia) according to the USDA soil taxonomy system = Classificatie problemen van geselecteerde bodemprofielen uit Noord Sumatra (Indonesia) volgens het USDA soil taxonomy system ADIWIGANDA, Mamat Rahmat by Mamat Rahmat Adiwiganda Gent State University of Gent 1986 iv, 97 p. : ill. ; 29 cm. + app. iv, 97 p. : ill. ; 29 cm. + app. 631.44ADIc Thesis (MSc)-State University of Gent, 1986 631.44(921.1) SOIL CLASSIFICATION NORTH SUMATRA 754/DTS/90-mfn4383