Writing this book would have been impossible without the help of certain institutions and persons. For a gas-producing and oil-processing country like the Netherlands, there was surprisingly very little, publicly available, research material. Public libraries’ collections contained, with a certain degree of inconsistency, little of the more specialised sources. I would therefore like to express my gratitude towards Royal Dutch Shell, and especially the library staff in The Hague, for allowing me to use the company’s library, thanking them for their assistance in finding and supplying the required data. I am also grateful for the financial assistance of the ‘Nederlandse organisatie voor wetenschappelijk onderzoek’ (NWO) and the Faculty of Law of the University of Leiden. They provided the financial means to work a (crucial) month in the very well equipped library of the Oxford Institute for Energy Studies. I am indebted to the staff of the Oxford Institute for Energy Studies, and particularly to Robert Mabro and Jeremy Turk, for their comments, support, and friendship. After I spent a month in the Institute in July 1989, I was able to return for two five-month periods in 1990 and 1991. For both periods, the Oxford Institute and the Leiden Law Faculty provided me with the necessary means. I would also like to express special gratitude to some people who have been a great support and supplied me with valuable comments at various stages of the study.