Call Number (LC) Title Results
I 19.13:2093 Quality of surface waters of the United States, 1968. 1
I 19.13:2094 Quality of surface waters of the United States, 1968. 1
I 19.13:2095 Quality of surface waters of the United States, 1968. 1
I 19.13:2096 Quality of surface waters of the United States, 1968. 1
I 19.13:2097 Quality of surface waters of the United States, 1968. 1
I 19.13:2098 Quality of surface waters of the United States, 1968. 1
I 19.13:2099 Quality of surface waters of the United States, 1968. 1
I 19.13:2100 Quality of surface waters of the United States, 1968. 1
I 19.13:2101 Surface water supply of the United States, 1966-70. 1
I 19.13:2101-3  
I 19.13:2102 Surface water supply of the United States, 1966-70. 1
I 19.13:2103 Surface water supply of the United States, 1966-70. 1
I 19.13:2104 Surface water supply of the United States, 1966-70. 1
I 19.13:2105 Surface water supply of the United States, 1966-70. 1
I 19.13:2106 Surface water supply of the United States, 1966-70. 1
I 19.13:2107 Surface water supply of the United States, 1966-70. 1
I 19.13:2108 Surface water supply of the United States, 1966-70. 1
I 19.13:2109 Surface water supply of the United States, 1966-70. 1
I 19.13:2110 Surface water supply of the United States, 1966-70. 1
I 19.13:2111 Surface water supply of the United States, 1966-70. 1