. An atlas of Secchi disc transparency measurements and Forel-Ule color codes for the oceans of the Oceanography. Ill. 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: ., book, bookcentury1900, bookleafnumber225, booksubjectoceanography