1. 1
    Published 1987
    ...HC 681 .A832...
    Journal
  2. 2
    Published 1987
    ...HT 147 .A2 .U725...
    Book
  3. 3
    Published 1989
    ...HC 412 .A832...
    Book
  4. 4
    by Yang, Yongzheng
    Published 1997
    ...HF 1717 .E86 .Y22 1997...
    Book