The track "Summer Heat" on side A has a rhodes sound which is so familiar. But reviews of the record in technomagazin's didn't give a clue about the source. Even the review in Riley's own DeBug Magazin does not mention the source. But I think I figured it out now: Riley has sampled from John Carpenter's soundtrack "Assault on Precinct 13". It makes an average minimal track really huge, because it perfectly captures the mood of the movie. Napoleon Wilson is the king!