TY - BOOK AU - Giacaglia, Giorgio E. O. TI - Periodic orbits, stability and resonances: Proceedings of a symposium conducted by the University of São Paulo, the Technical Institute of Aeronautics of São José dos Campos, and the National Observatory of Rio de Janeiro, at the University of São Paulo, São Paulo, Brasil, 4-12 September, 1969 SN - 9027701709 U1 - 521.1 PY - 1970/// CY - Holland PB - D. Reidel Publishing Company N1 - Includes bibliographical references ER -