@article{kiebert1954design, title = {Design of a Preamplifier for Low-Level Inputs}, author = {Kiebert, Jr., Martin V.}, journal = {J. Audio Eng. Soc}, volume = {2}, number = {2}, pages = {81--87}, year = {1954}, url = {https://www.aes.org/e-lib/browse.cfm?elib=58} }