I know he played at least once or more on every Bee Gee's album released, but I'd say he probably was 80% of the time their main bass player during their sessions or live concerts.
As for "Love You Inside Out," from their 1979 album, "Spirits Having Flown," he is credit as a bass player on that album, along with another bassist by the name of Harold Cowart. I'm not sure if it was him or Maurice who played on that track so I guess that's up to you to see because I can really tell. I also know Cowart played on some of Andy Gibb's records so he must've been someone they had come and play for them from time to time! He also played on a Thunder Island by Jay Ferguson in '77, that song is awesome, but that bass line is one of my favorites!