ISBNs beginnend mit 978-0-8493-xxxx-xC. K. Gupta × Extractive Metallurgy of Molybdenum C. K. GuptaCRC Press 1992 Extractive Metallurgy of Niobium C. K. GuptaCRC Press 1993 Hydrometallurgy in Extraction Process C. K. GuptaCRC Press 1990 Hydrometallurgy in Extraction Process C. K. GuptaCRC Press 1990
