TY - BOOK AU - Symposium conducted by the university of sao paulo, the technical institute of aeronautics ofsao jose dos campos (1969) AU - Giacaglia,G.E.O.,ed. TI - Periodic orbits stability and resonances SN - 9027701709 U1 - 521.3 PY - 1970/// CY - Hollaond PB - D.Reidel Publishing Company ER -