Our library did not take part in the collection analysis and does not have an institutional login to GreenGlass. We are interested in weeding based on EAST retention commitments. How can we discover if a title that we own has a retention commitment at another library?

Our library did not take part in the collection analysis and does not have an institutional login to GreenGlass. We are interested in weeding based on EAST retention commitments. How can we discover if a title that we own has a retention commitment at another library?