(1938). ... Core samples of the ocean bottom and their significance, Being a lecture delivered at the Administration building of Carnegie institution of Washington, November 23, 1937. by Dr. Charles Snowden Piggot ..

... Core Samples of the Ocean Bottom and Their Significance, Being a Lecture Delivered at the Administration Building of Carnegie Institution of Washington, November 23, 1937. by Dr. Charles Snowden Piggot .. 1938.

... Core Samples of the Ocean Bottom and Their Significance, Being a Lecture Delivered at the Administration Building of Carnegie Institution of Washington, November 23, 1937. by Dr. Charles Snowden Piggot .. 1938.