Gunn, Michael J. "“POLY” or “CELL”?" Microform & Imaging Review, 16.3 (2009): 231-232. Retrieved 19 May. 2013, from doi:10.1515/mfir.1987.16.3.231

Gunn, M. (2009). “POLY” or “CELL”?. Microform & Imaging Review, 16(3), pp. 196-272. Retrieved 19 May. 2013, from doi:10.1515/mfir.1987.16.3.231

Gunn, Michael J. 2009. “POLY” or “CELL”?. Microform & Imaging Review. 16(3): 196-272. Retrieved 19 May. 2013, from doi:10.1515/mfir.1987.16.3.231