1990-01-22 /bb-pbdea-bb/07/10,7/vnp36/vnp36.vfy 1990-05-02 /BB-BT99T-BB_1990/02/10,5/vnp36/vnp36.vfy 1990-05-02 /BB-PBDEB-BB_1990/07/10,7/vnp36/vnp36.vfy 1990-07-23 /BB-PBDEC-BB_1990/06/10,7/vnp36/vnp36.vfy 1990-07-23 /BB-PBDED-BB_1990/07/10,7/vnp36/vnp36.vfy