http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Periodic orbits, stability and resonances
Proceedings of a symposium conducted by the University of Sao Paulo, the Technical Institute of Aeronautics of Sao Jose dos Campos, and the National Observatory of Rio de Janeiro, at the University of Sao Paulo, Sao Paulo, Brasil, 4-12 September, 1969
International Symposium on Periodic Orbits, Stability and Resonances (1969 : University of São Paulo)
Instituto Tecnológico de Aeronáutica (Centro Técnico Aeroespacial)