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When	What	Comment
February 20, 2020	R. G. Markl	Added 1967 Unknown publisher edition of Delineation of sea floor roughness in the western North Atlantic, and added a new author R. G. Markl.
February 20, 2020	Delineation of sea floor roughness in the western North Atlantic	Added 1967 Unknown publisher edition of Delineation of sea floor roughness in the western North Atlantic, and added a new author R. G. Markl.
February 20, 2020	Delineation of sea floor roughness in the western North Atlantic	Added 1967 Unknown publisher edition of Delineation of sea floor roughness in the western North Atlantic, and added a new author R. G. Markl.