1406 1436 1305 1539 1312 1726 1087 1985 1615 1906 1658 1676 1300 1188 1151 1411 1767 1133 1816 1707 1980 1348 1766 1340 1993 1943 1347 1383 1716 1283 1848 1424 1540 1688 1230 1484 1827 1278 1164 1974 1864 1807 1535 1859 1762 1117 1836 1224 1099 1732 1306 1541 1047 1726 1436 1367 1616 1511 1364 1401 1511 1736 1059 1722 1872 1489 1669 1311 1849 1929 1737 1585 1470 1502 1465 1961 1421 1322 1656 1640 1497 1706 1159 1884 1054 1293 1107 1143 1975 1411 1549 1416 1067 1451 1783 1251 1221 1446 1975 http://library.phcsuphan.ac.th/search.usisassist.php?fromrefcode=&keyword=%20English%20language%20Problems,%20exercises,มีปัญหาในการเชื่อมต่อ/Connection Problems (open url)