The first reliable record of its existence are dated in 1566/1569.
However, for either to be effective, you need up-to-date and reliable financial records.
After the last reliable record in 1980 no considerable effort has been made until 2007 when four individuals were rediscovered.
The average temperature around the world in 1988 was the highest since reliable records began nearly a century ago, British scientists reported today.
He also says that their illiteracy means they cannot keep reliable records.
Data is always written down; memory is not a reliable record.
You've got at least a hundred years of reliable records, right?
The first reliable records of it are dated in 1566/1569.
"He has a more reliable record than most of the people I know."
There is simply no reliable record by which to assay the future.