This resource "下水道--積算・仕様" is, in addition, simply-referenced by the following URIs. (The next table describes reverse link where the right and left columns represent the subject and the predicate respectively and whose object is this resource, in the source. These subjects have no other attribute in this source.)
| is schema:about of 2 | <https://jpsearch.go.jp/data/bibnl-20019674> |
| is schema:about of | <https://jpsearch.go.jp/data/bibnl-21129511> |