(1985). Clays: A chapter from Mineral facts and problems, 1985 edition.
Chicago-čujuhus (17. p.)Clays: A Chapter from Mineral Facts and Problems, 1985 Edition. 1985.
MLA-čujuhus (9. p.)Clays: A Chapter from Mineral Facts and Problems, 1985 Edition. 1985.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.