1967 (age 10) Sulfur Mine to Agua de Chale (Nuevo Mazatlan) & Lagoon (future ‘Bahía Santa María’)
1971
1972 (age 14-15)
April 1973 with December ’73 Update Notes
1973 (age 16)
1978
1978
1979
1980
1982
1982
1988 (published in the Mexico West newsletter)
2004