Complex sentence: Bennett credits Reiner with having chosen the excerpts, and their sequence, Reiner's aim being a precisely 24-minute length; it was designed to fit three 78-rpm records (4 minutes per side).
Split into simpler sentences: Bennett credits Reiner with having chosen the excerpts, and their sequence. Reiner aimed for a precisely-24-minute length; it was designed to fit three 78-rpm records (4 minutes per side).