Cook, D. B. Ab initio valence calculations in chemistry / [by] D. B. Cook - England : Fletcher, 1974 - ix, 271 p. : ill. ; 24 cm. Includes index ISBN: 0408705515 : 7.50 Subjects--Topical Terms: Quantum chemistryValence (Theoretical chemistry)Atomic orbitals Dewey Class. No.: 541.383