Maybe that's not "oral transmission" in any purist sense, but it's close enough.

Others still fit into well established categories of folk tale and suggest an oral transmission.

In its early oral transmission during 1920-1925, the song underwent some variation.

The information is important because it can help health workers devise strategies to prevent oral transmission.

However, other cultural classical traditions may refer to oral transmission.

There had been oral transmission from generation to generation until then.

Memory was important in large part due to its role in oral transmission of information.

The work would have survived through oral transmission until first written down, perhaps in the 9th century.

This is a result of the text's oral transmission.

It shows that the oral transmission of culture is continuing.