共 50 条
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- [23] RESEARCH NEEDS IN SANITARY ENGINEERING JOURNAL OF THE SANITARY ENGINEERING DIVISION-ASCE, 1972, 98 (NSA5): : 805 - &
- [24] RESEARCH NEEDS IN SANITARY ENGINEERING JOURNAL OF THE SANITARY ENGINEERING DIVISION-ASCE, 1972, 98 (NSA2): : 299 - &
- [29] RESEARCH AND DATA NEEDS FOR FUTURE TRANSACTIONS-AMERICAN GEOPHYSICAL UNION, 1971, 52 (04): : 207 - &