(1947). Multiscope instruction manual: Model 3 / designed by Stephen H. Spurr and C.T. Brown, Jr., manufactured by Northeastern Engineering, Inc., Manchester, New Hampshire.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিMultiscope Instruction Manual: Model 3 / Designed by Stephen H. Spurr and C.T. Brown, Jr., Manufactured by Northeastern Engineering, Inc., Manchester, New Hampshire. 1947.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিMultiscope Instruction Manual: Model 3 / Designed by Stephen H. Spurr and C.T. Brown, Jr., Manufactured by Northeastern Engineering, Inc., Manchester, New Hampshire. 1947.
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