| Type |  Book |
| ชื่อเรื่อง | Water oxygen demand no. 2., study number 21 : Report of a study conducted by the Analytical Reference Service Training Program |
| พิมพลักษณ์ | Cincinnati : U.S. Department of Health, Education and Welfare, Public Health Service, 1965 |
| รูปเล่ม | 75 p. : ill |
| หัวเรื่อง | Biochemical oxygen demand |
| | Sewage --Analysis [] |
| | Water --Analysis [] |
| | Water --Dissolved oxygen [] |