...this compilation of assessment data for Boston's Back Bay study area gives the following information for each block: number of parcels, total square feet, assessed values (land, building and total), tax-ratable parcel total value, tax-exempt parcels total value, standard assessment ratios, sales / assessment ratios based on 1963-1965 sales, estimated average purchase price, assessed values 1955, 1960 and 1965, tax exempt parcels (address, area, owner, etc.), vacant parcels (address, area, owner, etc.), land value changes, 1955 to 1965 per parcel, etc.; also kept on this number is a similar items dated October 27, 1965; these items were in the BRA collection...