@article {RN19, title = {Amplification in Technical Manuals: Theory and Practice}, journal = {Journal of Technical Writing and Communication}, volume = {19}, number = {1}, year = {1989}, pages = {13-29}, doi = {10.2190/AQL3-WG5B-7GWA-K59B}, author = {Killingsworth, M. Jimmie and Gilbertson, Michael K. and Che, Joe} }