Pteridophyte (Isoetes) query

[Murray Dawson]

Dear Taxacom'ers,

              - Particularly those from Australia!

I have a very incomplete reference to an unpublished thesis prepared in
an Australian University.  Unfortunately, I cannot trace the date or
location through the library system here in New Zealand.

The partial reference is as follows-

"Marsden, Craig R. 19??: Isoetes... Thesis, University of ??, Australia."

Please can anyone help?  Thanks,

Murray Dawson