المؤلفون: Bloodworth, J. G., Parkinson, M. J.

المصدر: Journal of the Society of Archivists ; volume 9, issue 2, page 65-68 ; ISSN 0037-9816 1465-3907

الاتاحة: https://doi.org/10.1080/00379818809511582
http://www.tandfonline.com/doi/pdf/10.1080/00379818809511582