Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kitahata M. and Watanabe T. and Gokita Y.,The Construction of Eastern Breakwater at Hitachinaka Port,Concrete Journal,0387-1061,Japan Concrete Institute,1995,33,6,25-35,https://cir.nii.ac.jp/crid/1390282680432908160,https://doi.org/10.3151/coj1975.33.6_25