00550cam a2200193 4500 388868864 TxAuBib 20190813120000.0 190813|||||||||||||||||||||||||||||und|u 9781536419948 153641994X (OCoLC)57641388 TxAuBib Frith, Margaret. Who Was Thomas Alva Edison?. 20190813. 978143422124575 TXCOT