Jaarboek voor Suikerfabrikanten in Ned.-Indie. 1918/22. Amsterdam, 1921. Published and printed by J.H.de Bussy (also printed many of the certificates of the Dutch-Indies companies). Over 900 pages of rules, regulations, useful information and statistics. Including for example information on the pension funds of the sugar companies (the majority of sugar companies contributed to an industry-wide scheme over a 100 years ago). Usefully also a list of operating factories and their owning companies.