Mark McNally (EDT)/ John Schwarzmantel (EDT)
(2)
Ricardo Blaug/ John Schwarzmantel
(2)
Blaug, Ricardo,Schwarzmantel, John
(1)
Edited by John Schwarzmantel and Hendrik Jan Kraetzschmar
(1)
Ricardo Blaug (EDT)/ John Schwarzmantel (EDT)
(1)
;Schwarzmantel, John,Beetham, Helen
(1)