Metric spaces/ E. T. Copson. Copson, E. T. (Edward Thomas), 1901- Metric spaces. QA613 .C6 512.894 COM London, Cambridge U.P., 1968. 1968. 1968 Text [vii], 143 p. http://www.loc.gov/catdir/enhancements/fy0901/68018343-d.html http://www.loc.gov/catdir/enhancements/fy0901/68018343-t.html eng Cambridge tracts in mathematics and mathematical physics, no. 57