"Hey Bulldog" appeared on an album that was produced by who?
Yellow Submarine (album): Yellow Submarine is the tenth studio album by English rock band the Beatles, released on 13 January 1969 in the United States and on 17 January 1969 in the United Kingdom. Yellow Submarine (album):  The remainder of the album was a re-recording of the film's orchestral soundtrack by the band's producer, George Martin.
i don't know