“...MPRA Paper No. 65610, posted 16. July 2015...”
Ligazón do recurso

Table of Contents: “... -- v. 18. 1 April - 15 July 1952 -- v. 19. 16 July - 18 October 1952 -- v. 20. 19 October 1952 - 31...”

Table of Contents: “... 1952 -- v. 19. 16 July 1952-18 October 1952 -- v. 20. 19 October 1952-31 December 1952 -- v. 21. 1...”