Englert, P. D. (1991). Folder 55: Englert, P.A.J., J.F. Dempsey, W. Gaugler, W. Venuti, T.A. Cahill, and T.E. Gill. Geochemical Analysis Supporting Search for Ancient Monuments, 1991. Saint Louis University Libraries Digitization Center.
Lua i Stíl Chicago (17ú heag.)Englert, P.A.; Dempsey. Folder 55: Englert, P.A.J., J.F. Dempsey, W. Gaugler, W. Venuti, T.A. Cahill, and T.E. Gill. Geochemical Analysis Supporting Search for Ancient Monuments, 1991. Saint Louis University Libraries Digitization Center, 1991.
Lua MLA (8ú heag.)Englert, P.A.; Dempsey. Folder 55: Englert, P.A.J., J.F. Dempsey, W. Gaugler, W. Venuti, T.A. Cahill, and T.E. Gill. Geochemical Analysis Supporting Search for Ancient Monuments, 1991. Saint Louis University Libraries Digitization Center, 1991.