Led Zeppelin had a curious history of single releases in America. While the band was active, they released just 10 singles (they didn't release any in the UK while they were extant), which typically did just well enough to get a mention from Casey Kasem on American Top 40
. "D'yer Mak'er" was one of those singles (backed with "The Crunge
"), peaking at #20. Zeppelin was never a "singles band," so these releases were intended to drive sales of the albums, which they did. They often sold well enough to make the charts, however, leaving poor Mr. Kasem to wonder how to pronounce the title to this one.