Britta Anderson,!880, Sweden> PA

Am traveling to Sweden nest year and wish to do some family tree research before I go.Trying to find other descendents of Britta Anderson who immigrated to Antrim Co., PA about 1880 with some of her children.A daughter Karin stayed in Sweden and latter immigrated to Wheaton, MN with her husband Per Erick Erickson.I am the great grand daughter of Karin.Thanks!