LAYOUT TECHNIQUES: 2 columns

leftcontent

#main {
  float:left;
  width:67%;
  background:#fff;
  border-right:2px solid #000;
  border-bottom:2px solid #000;
  margin-right:15px;
  padding-bottom:20px;
}

left content test link, here here here

some text

some text

some text

some text

some text

some text

rightcontent

right right right CSS Layout Techniques, xxx xxx xxx.

altri link:
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bbb
ccc
ddd