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  1. 1
    Niobium, tantalum, molybdenum and tungsten : Report of a conference held in the University of Sheffield, 20th-22nd September, 1960, and organized by the Dept. of Metallugy /
    Printed Book
  2. 2
    The chemistry of niobium and tantalum,
    由 Fairbrother, F. (Fred)
    出版 1967
    Printed Book
  3. 3
    Tantalum and niobium.
    由 Miller, George Leslie
    出版 1959
    Printed Book
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