@inproceedings{mci/Heller1971,
author = {Heller, Ehrenfried AND Roth, Siegfried},
title = {Siemens-System 300 für Prozeßautomatisierung, Band 2: Prozeßperipherie},
booktitle = {},
year = {1971},
editor = {},
publisher = {Siemens Aktiengesellschaft},
address = {Berlin und München}
}