00367cgm a2200133 4500 606438006 TxAuBib 20151006120000.0 920430|||||||||||||||||||||||||||v|eng|u (OCoLC)733792531 TxAuBib Nat'l Geo.: Explorers: a century of discovery [video recording]. 1 videocassette, (90 min.) : sd., col. TXNAV