https://digital.library.lse.ac.uk/Documents/Detail/report-on-the-census-of-production-for-1972.-pa321-aluminium-and-aluminium-alloys/430767
Report on the Census of Production for 1972. PA321 Aluminium and aluminium alloys - LSE Digital...
https://digital.library.lse.ac.uk/Documents/Detail/report-on-the-census-of-production-for-1982.-pa321-agricultural-machinery-and-tractors/447394
Report on the Census of Production for 1982. PA321 Agricultural machinery and tractors - LSE...
https://digital.library.lse.ac.uk/Documents/Detail/report-on-the-census-of-production-for-1992.-pa321-agricultural-machinery-and-tractors/460112
Report on the Census of Production for 1992. PA321 Agricultural machinery and tractors - LSE...
https://digital.library.lse.ac.uk/Documents/Detail/report-on-the-census-of-production-for-1988.-pa321-agricultural-machinery-and-tractors/456399
Report on the Census of Production for 1988. PA321 Agricultural machinery and tractors - LSE...