Acervus is possible thanks to the support of the Convivial Stiftung.

Several people, libraries and archives collaborated to make available the contents that are part of this collection. We are thankful and acknowledge the support of:

• Ivan Illich and Valentina Borremans personal library in Ocotepec (Mexico)
• El Colegio de Mexico Library - COLMEX
• Universidad Autonoma de Morelos (UAEM) Library Amoxcalco (Mexico)
• CELAM Library (Colombia)
• Fragmente Archive (Wiesbaden, Germany)

• Valentina Borremans
• Marianne Gronemeyer
• Gustavo Esteva
• Fabio Milana
• David Cayley
• Aldo Zanchetta
• Carl Mitcham
• Sylvia Marcos
• Manolo Callahan
• Carl Mitcham
• David Barkin
• Patrick Farenga
• Silja Samerski
• Bill Arney
• Dana Malloy
• Sajay Samuel
• Samar Farage
• Heinrich Dauber
• Aaron Falbel
• Madhu Prakash
• Dana L. Stuchul
• Vijaya Nagarajan
• Neto Leao
• Matia Cucchi
• Douglas Lummis
• Roberto Ochoa
• and others…