First Country Rock song?

"Mr. Spaceman" by the Byrds was the third single from the 1966 "5D" (Fifth Dimension) album.  As a single it barely cracked the top 40, but as a song it was arguably responsible for two music genres, space rock and country rock.  It has also been covered by a diverse group of artists from Jimmy Buffett to The Muppets to The Flying Burrito Brothers to Alvin and the Chipmunks.  The Byrds performed the song on many TV shows in the 60's also.  Today the song seems familiar... but mostly forgotten.
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