. An atlas of Secchi disc transparency measurements and Forel-Ule color codes for the oceans of the Oceanography. .& o 0. 134. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Frederick, Margaret Anne. Monterey, California: U. S. Naval Postgraduate School

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Keywords: ., bookcentury1900, bookcollectionamerican, booksubjectoceanography