About KNAB L I
About National Bureau of Standards, Washington, D.C.
About WALKER H N
About Virginia Highway and Transportation Research Council
About CLIFTON J R
About National Bureau of Standards, Washington, D.C.
About FULLER E R JR
About National Bureau of Standards, Washington, D.C.
About Cement and Concrete Research
About mortar
About Properties and analysis of cement
About Mortar,concrete
About モルタル
About 破壊
About 観察
About けい光
About 薄片