http://www.jstor.org/discover/pgs/i

http://www.jstor.org/discover/pgs/index?id=10.2307/4269414&img=dtc.56.tif.gif&uid=3739136&uid=2129&uid=2&uid=70&uid=4&sid=21103339913423&orig=/discover/10.2307/4269414?uid=3739136&uid=2129&uid=2&uid=70&uid=4&sid=21103339913423

ผลลัพธ์ (ไทย) 3:

http://www.jstor.org/discover/pgs/index?id=10.2307/4269414&img=dtc.56.tif.gif&uid=3739136&uid=2129&uid=2&uid=70&uid=