Birkett1900–1980নাম ও পদবিBertha Birkettসময়রেখাBirth1900Death1980সম্পর্কসন্তানDixon (1930–1990)Dixon (1940–1940)ভাই-বোনBirkett (1890–1970)Birkett (1880–1930)Birkett (1880–1960)Birkett (1890–1950)William Birkett (1896–1911)Birkett (1890–1960)Birkett (1900–1980)বাবা-মাGilbert Birkett (1866–?)Charlotte Davies (1869–?)উৎসwikitree Birkett-218