Was reading an article on the history of ABC-Paramount Records, and came across following:
"The mid-1970s at ABC were an unfortunate time for music lovers. To save space, and consequently a few dollars, ABC systematically went through their vaults and discarded all tapes except the finished masters for most artists. Consequently, few multitrack masters or outtakes exist for early ABC material, and the ABC masters on compact disc sound worse than they could have if the "cleanup" program hadn't occurred. Some masters, such as the Ray Charles masters which reverted to him after his leaving the label, escaped from this short-sited "cost savings," but in general, the ABC catalog of today is nothing like what it should be, given the rich musical heritage of the label."
http://www.bsnpubs.com/abc/abcstory.html