na INLIS000000000004780 Ind 0010-1118004780 Acid sulphate soils in the humid tropics: ecological aspects of their development KLEPPER, O. O. Klepper; Gt. Chairuddin; Gt. M. Hatta [s.l.] AARD 100 p.: ill.; 24 cm. 100 p.: ill.; 24 cm. 631.41 SOIL CHEMISTRY ACID SOILS 2122/DOK/95