TY - BOOK AU - RAKSHIT, SISIR CHANDRA TI - ATOMS AND Dn - IONS IN PERTURBATION FIELDS ; THEORY AND CLASSIFICATION BASICS OF ATOMIC AND CRYSTAL FIELD STATES AND RELATIVE ENERGIES / U1 - 539.77 PY - 1998/// CY - CALCUTTA PB - SARAT BOOK HOUSE KW - ATOMIC PHYSICS ER -