Environment and conservation : cooperation : second protocol between the United States of America and Mexico amending Agreement of November 16 and 18, 1993 ; signed at Washington and Mexico City, January 17 and April 18, 2017 with appendix.
Second protocol between the United States of America and Mexico amending Agreement of November 16 and 18, 1993 ; signed at Washington and Mexico City, January 17 and April 18, 2017 with appendix