John Hartley is an English singer and songwriter. He is the co-writer of the songs "Oasis" (with Gary Sadler) and "Amazing Grace" (with Sadler and Dwayne Larring). Both songs were featured in Petra's 2001 album, Revival.
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John Hartley is an English singer and songwriter. He is the co-writer of the songs "Oasis" (with Gary Sadler) and "Amazing Grace" (with Sadler and Dwayne Larring). Both songs were featured in Petra's 2001 album, Revival.