ðə sˈaʊsə ˈɑːɹkaɪvz ænd sˈɛntɚ fɔːɹ ɐmˈɛɹɪkən mjˈuːzɪk æt ðə jˌuːnɪvˈɜːsᵻɾi ʌv ˌɪlənˈɔɪ æɾ ɜːbˈɑːnətʃæmpˈeɪn hˈoʊldz ðə dʒˈɛfɹi sˈændboːɹɡ kəlˈɛkʃən ʌv ˈɪədʒˌoʊ kɪlpˈaɪnən mjˈuːzɪk, nˈaɪntiːnhˈʌndɹɪd twˈɛnti nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi, wˌɪtʃ kənsˈɪsts ʌv pˈʌblɪʃt skˈoːɹz, mˈænjuːskɹˌɪpts ɚɹˈɪdʒɪnəlz ænd fæksˈɪmɪlˌɪz, nˈuːzpeɪpɚɹ ænd dʒˈɜːnəl ˈɑːɹɾɪkəlz, kˈɑːnsɚt pɹˈoʊɡɹæmz, fˈoʊɾəɡɹˌæfz, fˈɑːnəɡɹˌæf ænd ɹˈiːltəɹˈiːl ɹᵻkˈoːɹdɪŋz.
The Sousa Archives and Center for American Music at the University of Illinois at Urbana-Champaign holds the Jeffrey Sandborg Collection of Yrjo Kilpinen Music, 1920–1940, which consists of published scores, manuscripts (originals and facsimiles), newspaper and journal articles, concert programs, photographs, phonograph and reel-to-reel recordings.