finding saved document

[Gasket Racing]

Hi there, I've been using  openoffice for a while now and love it.  I've
been doing some reports lately and when I'm finished a subject, I just
delete the content and start the next one then save as.  Sadly I must have
just hit save once and I lost my entire previous subject.  Is there a way
of finding the previous saved version of the file?  Ie saved it on
wednesday the finished subject friday and  resaved.  Can I find Wednesdays
version
cheers
clint