The source of the river comes from melting snow high in the mountains, thus making it a very pure and clean source of water.

He also warns that "the old ladies, our purest source of folk songs, become more and more rare with each day".

So they sent their 'theological students' there to learn its doctrines from the purest source.

The evidence is scattered and no pure historical source exists for that period.

Also use as pure a source of water as possible for drinking and cooking.

"Does it have a tributary with a pure source?"

It begins in a lake called Uprod, which is a pure source," said the old man.

Private equity is not intrinsically evil and there is no pure source of finance.

A nearly pure source of calcium carbonate is necessary to refine sugar.

I am convinced that the Bible, God' s word, is the only pure source of proper standards and real values.