Check the listing for details. Operators Guide To Microscopic Examination Activated Sludge Don R Stanley 1977. Condition: Used. Listed at 60.00 USD. This is a hand made vintage comprehensive guide to microscopic examination of activated sludge by Don R Stanley, published in 1977. It provides detailed instructions and insights on how to effectively examine sludge samples under a microscope, allowing for accurate analysis of the microorganisms present. The book is an excellent resource for those in the scientific community, especially those studying microbiology and wastewater treatment. The guide was manufactured in the United States and falls under the Collectibles category. It belongs to the Science & Medicine (1930-Now) and Scientific Instruments sub-categories, specifically Microscopes and Lab Equipment. This will be an invaluable addition to any collection, providing a wealth of information for research and study purposes. See photos for details..