19 May 1997 May 18, 2014 Author: Staff The Sierra Gorda biosphere is established. Famous Words of Inspiration..."No distance of place or lapse of time can lessen the friendship of those who are thoroughly persuaded of each other's worth." Robert Southey — Click here for more from Robert Southey Related posts: 18 January 2002 6 September 1997 11 May 1997 31 August 1997 24 December 1997 31 August 1997 27 November 1997 15 December 1997 16 December 1997 Categories: History Tags: 19 May, 1997