By Straker, Anita
By Nesher, Pearla
By Brooke. Michael and Birkhead Tim.
By Padmanabhan, T.
By Buckton, Chris, Corbett, Pie
By Crebbin, June
By Hayes, Rosemary
By Duke, Dulcie
By Hancock, Mark
By Unidentified Author
By S L Green
By Petersen, Carolyn Collins, Brandt, John C.
By Ferguson, Kitty
By School Mathematics Project
By Audi, Robert
By Altschuler, Daniel R.
By Narlikar, Jayant Vishnu
By Lincoln, R. J.
By Langley, Matt
By Hollingsworth, T. H.
By Finlayson, Clive
By Blute, Marion
By Kooijman, S. A. L. M.
By Garnsey
By Whiten, Andrew
By Schulkin, Jay
By Cooke, D
By Hornby, William F., Jones, Melvyn