Father written some property on unregistered deed.

If it is unregistered partition deed between you and your father, you are having knowledge of such deed in 1985 and you must also be having a copy of such document, what is the explanation for remaining silent for 34 years as the claim is barred by limitation.  I am sorry some facts are missing in the query for your silence for 34 years and who is in the possession and the names in revenue records etc.  Contact local advocate to explore possibilities.

The simple option is to file a suit for partition pleading that your father had died intestate and that you are joint possession of the late father's property and seeking the partion of the property. Let the defendents come up with their side of the story.