Looking for the names of the mother of:

(Elvera?) Vera Marie Olofson-Walgren
Her fathers name was Olof Olofson. The all resided in Carbon County, Wyoming. Vera was born and lived all her life there. She was born in either 1900 or 1901. Married Oscar Walgren some time between 1910 and 1918. Also in Carbon County. Oscar retrieved a Social Security # in Wyoming in 1955, was a Swedish Immigrant. Came to New York in 1910. Looking for immigration record for him! Any helpful information is greatly appreciated. Thank you.