Perkins, Peter Graham. Elementary molecular bonding theory [by] Peter G. Perkins. - London Methuen 1969. - viii, 183 p. illus. 20 cm. - Methuen's monographs on chemical subjects . Distributed in the U.S.A. by Barnes & Noble. Bibliography: p. 178. ISBN: 0416426808 LCCN: 71447472 Nat. Bib. No.: B69-26915 Subjects--Topical Terms: Chemical bonds.Molecular orbitals. LC Class. No.: QD461 / .P43 Dewey Class. No.: 541/.224