John DeGroff is listed in the credits for the following albums:
Year | Artist | Album | Role |
---|---|---|---|
1974 | Petra | Petra | Bass |
1977 | Petra | Come and Join Us | Bass |
John DeGroff is listed in the credits for the following albums:
Year | Artist | Album | Role |
---|---|---|---|
1974 | Petra | Petra | Bass |
1977 | Petra | Come and Join Us | Bass |
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