TY - CPAPER AU - J. Gao AU - J. Delos CY - Antigua Hacienda de Galindo, San Juan del Rio, Quer\ etero, Mexico N1 - JILA Pub. 5405 PB - World Scientific Publishing Company, Singapore PP - Antigua Hacienda de Galindo, San Juan del Rio, Quer\ etero, Mexico PY - 1994 TI - Closed orbits and recurrences in atomic spectra: Patterns of trajectories in integrable systems ER -