New materials for environmental design, 1994: t.p. (Gerard Zwetsloot) p. 7 (Dr. Gerard I.J.M. Zwetsloot; studied envir. chem. and toxicol.; empl. at Dutch Safety Inst. (now Dutch Inst. for the Working Environ.) since 1985; Ph.D. in soc. sci., 1994)

Joint management of working conditions, environment, and quality, 1994: t.p. (Gérard Isaäc Jossif Martin Zwetsloot) p. 335 (b. 05-12-49 in The Hague)

Design for sustainable development, c1998: t.p. (Gerald Zwetsloot) p. vii (Gerard Zwetsloot; NIA TNO, Amsterdam)