Spider hard top removal

[Tanthor@domain.elided]

Hi all,
	I have a parts car that I bought a while back.  I am starting to 
dismantle it and have run into a snag before I even begin.
It is a 76 Spider with a hard top.  I can't for the life of me figure out how 
to get the darn thing off.  The attachment at the windshield is a no brainer 
but what is holding it to the rear deck?
Thanks for any help.
Ed Gibbs
AROC
78 Alfa Spider
76 Spider (parts car.)

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