Genealogy Forum UK

I have reached an impasse with my research. I am heavily invested in Wills and Parish Records
for the period prior to 1550 (in Oxfordshire) but am at a loss when it comes to other sources of
material for the period. Consequently, I am interested in land/property records, Lay Subsidy
Rolls, Deeds, Manor Rolls, etc. but have no idea how to access such information.
Can anyone help?

Is there anything listed on here? http://www.oxfordshire-record-society.org.uk/index.htm
It would be expensive to buy any of the books but perhaps they would have them at an archives or library? Some might be available through Familysearch, on microfilm/fiche.
Which parish or area would it be? http://archiveshub.ac.uk/data/gb161-mss.rollsoxon.166-7 is just an example. Have a good Google and you might find something online.