van Heerden's description of Roccosaurus tetrasacralis

[Ruben Guzman <paleovert@yahoo.com.mx>]

Hello!

I would appreciate any help to get the original description and illustrations 
of the melanorosaurid prosauropod Roccosaurus tetrasacralis that presumably is 
contained in Jacques van Heerden's dissertation titled: 

The comparative anatomy of the postcranial skeleton and the relationships of 
the South African melanorosauridae (saurischia: prosauropoda). Bloemfontein : 
University of Orange Free.State, 1977. 175 pp.

Thank you very much in advance.
Best regards,

Ruben Guzman.