Citation: Park, J.Y.; Song, S.H.; Kim, U.S.; Kim, Y. (1989). Two crystal structures of dehydrated calcium and silver exchanged zeolite A, Ag(12-2x) Ca(x)-A (x=2.5 and 5.0). Daehan Hwahak Hwoejee (= Journal of the Korean Chemical Society), 33, pp. 452-458.