Studies on the structure and origin of soil humic acids by Curie point pyrolysis in direct conbination with low-voltage mass spectrometry Back to all publications Publication date 1 January 1975 Reference H.L.C. Meuzelaar, P.G. Kistemaker, B.R. Nagar and E.S. Waight, Studies on the structure and origin of soil humic acids by Curie point pyrolysis in direct conbination with low-voltage mass spectrometry, Plant Soil 43, 681-685 (1975)