TY  - BOOK
AU  - Walkley,A.
AU  - Black,I.A.
TI  - An examination of the Degtjareff method for determining soil organic matter, and a proposed modification of the chromic acid titration method
UR  - https://drive.google.com/file/d/13o5hI2_vbgVBFJeBTMxsQJ3JpdIiPuPe/view?usp=drivesdk
ER  -