Texas A&m University creator text us 1978 1991 continuing a Existencias: 1978 no. 1270; 1987 no. 1555, 1558, 1564, 1566-1570, 1583, 1585, 1589-1590, 1594, 1596, 1602, 1604, 1617, 1623, 1632; 1990-1991 no. 1649-1651, 1653-1654, 1658-1659, 1663, 1668, 1693, 1695, 1701-1710; 1993-1994 no.1711-1720 Agricultura AR-ReUNN 260630 20260702003756.0 251957 spa