Ragnar Redbeard
Books
Survival of the fittest
1903
ISBN 9780915179121
Might Is Right
1927
ISBN 9781300653899
Might is right, or, The survival of the fittest
1927
ISBN 9781387518111
Might is Right - The Survival of the Fittest
1999
ISBN 9780967812311
Might Is Right or Survival of the Fittest
2014
ISBN 9781500312732