Description of manganese nodules and crust collected from the Hakuho Maru Cruise KH-68-3, July-August, 1968, in Northwestern Pacific Ocean

The cores and dredges described in this report were taken on the KH-68-3 Expedition in July-August, 1968 by the Ocean Research Institute, University of Tokyo from the Hakuho Maru. A total of 16 cores and dredges sites have been were.