1. 1
    by Esty, Daniel C.
    Published 1994
    ...HF 1379 .E82...
    Book
  2. 2
    by Dua, Andre
    Published 1997
    ...HC 681.3 .E5 .D812...
    Book
  3. 3
    by Esty, Daniel C.
    Published 2006
    ...HD 30.255 .E82 2006...
    Book