Conversation so far:
What were Michael Martin Murphey's Austin/Outlaw country years?
In 1971, Murphey returned to Texas and became part of the so-called Outlaw country movement.
Did he work with Merle Haggard?
CANNOTANSWER.
Did he record any albums at this time?
In 1972, Johnston produced Murphey's first album Geronimo's Cadillac in Nashville, Tennessee.

Question: Was the album successful?
Self-contained rewrite: Was Geronimo's Cadillac successful?