study of the effects of iron and copper on the degradation of paper and evaluation of different conservation treatments / H.J. Porck, W. Castelijns study of the cause of damage on a pair of books / J.B.G.A. Havermans ; TNO Institute of Industrial Technology publicatie industriële terreingebruik in Nederland : een planologische facetstudie = Industrial land-use in the Netherlands : a study on a facet of physical planning / door … economic mobilization studies Procurement / Industrial College of the Armed Forces
