Roger Perman is on CollEc

rank value
closeness 17869 4.96279
betweenness 13542 0.814961

co-authors

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