I have no first-hand information about the quality or reliability of the sources cited.

The trouble was, most of the first-hand information came from other Indian servants, and nobody believed what they said.

I was there before the recent unrest, so can't provide any first-hand information.

It also provides first-hand information about how the policy is being executed.

And it's like, okay, well, it'd be fun to have a little first-hand information about that, too.

Primary evidence is first-hand information about an event, not based on other sources.

"I have never been asked for first-hand information on the behavior of our head coach."

A primary source is first-hand information, observed directly by the researcher.

For the interviews, we made a list of who could provide first-hand information.

Once again, if you wish to hear first-hand information, those who were there will be able to give you the details.