Share of daughter in father self acquired proeprty

My Mother was born in 1948, in vijaywada ( AP state). Her name along with her father name was recorded in High school certificate and also the same was reflecting in Passport issued by GOI. They are a very well and reputed family in VIJAYWADA between 1932 till date, and my grandfather was into civil works (contractor) . They are 4 brothers and 5 sisters.Her father during the marriage of his two elder daughter (1&2nd daughter), gave some property when he was alive as part of their gift in marriage. Unfortunately he suddenly passed away in 1963, with 3 daughters , aged 16, 14 and 5 years, leaving one self acquire property LAND AND big HOUSE build on that land with his own funds. He had not signed any will or given any gift to any one. When he died the status is 2 elder daughter - got married and send. Left are mother +4 sons + 3 daughters as on 1963. The property is to be shared between them and each one gets a share of (1/8) .. wife + 7 children My mother got married in 1964 MAY, and rest two sisters got married in 1968 and 1980. While last two sisters had signed settlement docs in due curse of time and gave a declaration that they have no claim in their father property, the same was not settled with my mother. Her father self acquired property was subsequently partitioned by remaining brother ( 4) and my mother was denied her share. They subsequently partitioned the property without my mother knowledge and each one sold their share individually to other parties. How CAN my mother get back her share and can she now file a petition in court PRAYING for her share of total property which was partitioned illegally among her 4 four brothers Please advice how my mother can get back her father property share ? How can she get the partition done to be declared as null and void and get notices issued to all her brothers who did the illegal transaction and got occupied? She raised her concern with her brothers on many occasions and none seems to be bothered nor giving any information how her father property was partitioned and sold without her knowledge and consent ? As a women she want to fight for her right and the injustice done to her by her brothers .While all her siblings got the share , only she was left alone and brothers cheated and did a illegal transactions and managed to partition the property and subsequently sell it off silently without her knowledge. Thanks/Rama krishna/[deleted]