Waste materials in construction : proceedings of the International Conference on Environmental Implications of Construction with Waste Materials, Maastricht, the Netherlands, 10-14 November 1991 / ed. by J.J.J.M. Goumans, H.A. van der Sloot, Th. G. AalbersBeoordeling van bouwstoffen in het licht van het Bouwstoffenbesluit-WBB / [eindred.: J.J.M. Goumans ... et al.]Environmental aspects of construction with waste materials : proceeding of the international conference on environmental implications of construction materials and technology developments, Maastricht, the Netherlands, 1-3 June 1994 / ed. by J.J.J.M. Goumans, H.A. van der Sloot, Th.G. AalbersWaste materials in construction : putting theory into practice : proceedings of the international conference on the environmental and technical implications of construction with alternative materials, WASCON '97, Houthem St. Gerlach, the Netherlands, 4-6 June 1997 / ed. by J.J.J.M. Goumans, G.J. Senden, H.A. van der SlootBeton en mortel met poederkoolvliegas verkregen door bijstoken / [CUR-onderzoekscommissie B 71 'Poederkoolvliegas (bijstoken) in mortel en beton': J.M. Goumans, voorz. ... et al.]Waste materials in construction, WASCON 2000 : proceedings of the international conference on the science and engineering of recycling for environmental protection, Harrogate, England 31 May, 1-2 June 2000 / ed. by G.R. Woolley, J.J.J.M. Goumans, P.J. Wainwright