1756 1699 1889 1396 1948 1499 1257 1683 1069 1935 1840 1025 1111 1486 1017 1207 1015 1689 1270 1335 1582 1847 1849 1489 1452 1112 1195 1933 1137 1278 1587 1929 1390 1505 1703 1879 1674 1124 1254 1440 1037 1998 1692 1539 1349 1985 1302 1538 1530 1353 1883 1518 1958 1079 1255 1918 1073 1525 1847 1595 1882 1131 1493 1877 1713 1256 1462 1152 1416 1632 1753 1963 1465 1591 1552 1507 1766 1617 1308 1282 1723 1616 1312 1605 1001 1398 1788 1580 1849 1564 1357 1834 1711 1382 1944 1039 1201 1852 1425 https://ulib.bcnpb.ac.th/ulib6search.usisassist.php?fromrefcode=&keyword=%20Robert%20C.%20Richardson.มีปัญหาในการเชื่อมต่อ/Connection Problems (open url)