Roger Perman is on CollEc

rank value
closeness 17802 4.96268
betweenness 13480 0.817404

co-authors

  1. David Stern [pst75]
  2. Joseph Byrne [pby6]
  3. P B Anand [pan205]
  4. Peter McGregor [pmc127]
  5. John Swales [psw28]