https://digital.library.lse.ac.uk/Documents/Detail/report-on-the-census-of-production-for-1988.-pa492-musical-instruments/457065
Report on the Census of Production for 1988. PA492 Musical instruments - LSE Digital Library
https://digital.library.lse.ac.uk/Documents/Detail/report-on-the-census-of-production-for-1974-and-75.-pa492-linoleum-plastics-floor-covering-leathercloth-etc/436058
Report on the Census of Production for 1974 and 75. PA492 Linoleum; plastics floor-covering;...