Covers:

1969:

Charlie Louvin [as It's Not A Big Thing; recorded prior to the original]

1970:

Mills Brothers [their only C&W hit]

1970:

Tex Williams [idem]

1970:

Arthur Prysock

1971:

Eddy Arnold

1971:

Elvis Presley [on LP Love Letters From Elvis]

1972:

Roy Orbison [his Orbison Way album ('66) holds his own composition sharing the same title]