Several printers and publishers have regularly donated deposit copies of their publications, notably Mennonite Publishing Network's Herald Press/Faith & Life Resources and Pathway Publishers (operated by Old Order Amish). Contributions have also been critical in the library's effort to sustain comprehensive acquisition of newly published material. Exchanges of material with sister collections, such as Bethel College's Mennonite Library and Archives (North Newton, Kansas), Eastern Mennonite University's Menno Simons Library (Harrisonburg, Virginia), and the Heritage Historical Library (Aylmer, Ontario), have helped broaden MHL holdings beyond the Swiss South-German Old Mennonite segment that continues to characterize their core strength.