Alva, Alejandro.
Conservation and Management of Earthen Architectural and Archaeological Heritage. - Roma-IT : ICCROM, 1997. - p. 10-13 - Irregular - No. 23 (Sep. 1997) - ICCROM Newsletter ; no. 23 1010-2639 . - Italia. International Centre For The Preservation and Restoration of Cultural Property. .
Conservation and Management of Earthen Architectural and Archaeological Heritage. - Roma-IT : ICCROM, 1997. - p. 10-13 - Irregular - No. 23 (Sep. 1997) - ICCROM Newsletter ; no. 23 1010-2639 . - Italia. International Centre For The Preservation and Restoration of Cultural Property. .