1. A pyrolysis gas chromatography method for discrimination of soil humus types;Bracewell;J. Soil Sci.,1976
2. The Soils of the Country Round Banff, Huntly, and Turniff;Glentworth,1954
3. The Soils of the Country Round Aberdeen, Inverurie, and Fraserburgh;Glentworth,1963
4. Copper availability in New Zealand soils;Guy;N.Z. Soil News,1958
5. Factors of Soil Formation;Jenny,1941