We've activated the "Discover" buttons in the Oxford Music Online tool. So, when you look at a bibliography you can click on the blue "Discover" button to see if there is online access to the article. If not, it will provide you with a link to our catalog, which you can then search to see if we have print access.
Here's what it looks like (from the Steve Reich entry):
and when you click on the Discover button for K.R. Schwarz: ‘Steve Reich: Music as a Gradual Process’, PNM, xix (1980–81), 373–92; xx (1981–2), 225–86 you get: