"IMSLP stands for International Music Score Library Project. The logo is a capital letter A, taken from the very first press-printed book of polyphonic music, the Harmonice Musices Odhecaton, published in 1501. Its printer, Ottaviano Petrucci, is this library's namesake." --From home page
Use Tripod to find scores held by the Tri-Colleges, and limit the "Collection" to Sound Recordings.