Holt, J. A. Extraction of macro organic matter from soil - (s.l.) : CSIRO. Division of Soils, 1980 - 5 p. - Divisional report ; 45 . - Divisional report ; 45 . LCCN: 16246 Subjects--Topical Terms: Suelos--Análisis.Suelos--Materia orgánica.