Roger Perman is on CollEc

rank value
closeness 17650 4.96268
betweenness 13396 0.821063

co-authors

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