The Center for the Study of Natural Resources (Spanish: Centro de Estudios de los Recursos Naturales, CERNA) was a Bolivian environmental organization. It was an arm of the prodemocracy movement that opposed policies encouraging foreign ownership of Bolivian resources.
The CERNA was founded by Carlos Brockmann, Jose Lorini, and Guido Capra Gemio in 1970s.
In 1978, 1979 and 1980 the CERNA took part in an electoral coalition Democratic and Popular Union backing Hernán Siles Zuazo

Hernán Siles Zuazo

Hernán Siles Zuazo was a politician from Bolivia. He served as his country's constitutionally elected president twice, from 1956 to 1960 and again from 1982 to 1985....

.