共 50 条
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- [24] WATER USE, CONSUMPTION, AND OUTLOOK IN UNITED-STATES IN 1970 JOURNAL AMERICAN WATER WORKS ASSOCIATION, 1973, 65 (05): : 302 - 308
- [30] PREVALENCE OF BLACK-WHITE MARRIAGE IN UNITED-STATES, 1960 AND 1970 JOURNAL OF MARRIAGE AND THE FAMILY, 1974, 36 (02): : 246 - 258