Wang Laboratories, 600 Technology Park Drive, Billerica: Plan of Land (Howe Surveying Associates, April 8, 1997): Lots 1-5 on Concord Road and Route 3; Lot 4 (45.7 acres) and Lot 5 (the Jonathan Hill House, 1.46 acres)

Wang Laboratories, 600 Technology Park Drive, Billerica: Plan of Land (Howe Surveying Associates, April 8, 1997): Lots 1-5 on Concord Road and Route 3; Lot 4 (45.7 acres) and Lot 5 (the Jonathan Hill House, 1.46 acres), 1997 (Plan Book 194 Page 59)