by H. S. Hall and S. R. Knight. by H.S. Hall and S.R. Knight. by G. H. Hardy and E. M. Wright. by D. O. Hall and K. K. Rao. [by] D. W. Watson [and] H. E. Wright. by G. H. Hardy, E. M. Wright. edited by I. R. Hill and S. J. L. Wright. G. M. Hardy and E.M. Wright. Edited by C. S. Grunsell [and] A. I. Wright. L.T. Butt and D.C. Wright.