{"id":"002013472","type":"book","title":"Casemates and cannonballs","publisher":"U.S. Dept. of the Interior, National Park Service : for sale by the Supt. of Docs., U.S. Govt. Print. Off.","publisher-place":"Washington","author":[{"family":"Hanson","given":"Lee H."},{"family":"Hsu","given":"Dick Ping"}],"issued":{"raw":"1975"}}