DAO, CHAU THU. Clay Minerals and Their Relation to Some Chemical Properties in Major Soils of Viet Nam. Ph. D. Thesis Ha Noi Agricultural University. 1987
NGUYEN, THI DAN. Effect of Organic Matter on Water and Physical Properties in Relation to Soil Fertility of Grey Degraded Soils in Hiep Hoa, Ha Bac Province. Scientific Research Project. 1995
NGUYEN, VI. Major SOil Types in Viet Nam. 1977
NGUYEN, VI. Soil Chemistry in North of Viet Nam. 1978
RICH, C. I. Hydroxy interlayers in expandable layer silicates. Clays Clay Miner. 1968, 16, 15-30
THAI, PHIEN. Degraded Land and its Data Collection and Analysis in Viet Nam. 1998
WHITTIG, L. D. X-ray diffraction techniques. Methods of Soil Analysis. Part 1 Physical and Mineralogical Methods. 1986, 331-362