HarperCollins, ISBN 0-06-002760-6 ISBN 978-0-06-002760-5* Burbidge, E.M., Burbidge, G.R., Fowler, W.A.
HarperCollins, ISBN 0-06-002760-6 ISBN 978-0060027605*Burbidge, E.M., Burbidge, G.R., Fowler, W.A.