Yodeling Slim Clark began recording around 1946 for CONTINENTAL
RECORDS (these are 78rpm records).
There are a number of online sources for information - such as
BILLBOARD magazine, many issues are available via Google Books.
There is a website devoted to REMINGTON Records which reissued
many of his 78rpm releases on LP.
Please provide some information about your project, and the amount
of detail you are looking for.
Best wishes, Thomas.