PDF-Treating Biological Growths on Historic Masonry Biological growths

Author : yoshiko-marsland | Published Date : 2015-08-01

1 2 a group of chemicals known as quaternary ammonium compounds These are commonly used and are discussed below 149 bleach 151 though effective at killing microorganisms

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Treating Biological Growths on Historic Masonry Biological growths: Transcript

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