Chemical News and Journal of Industrial Science, Tom 144,Wydanie 3764Chemical news office., 1932 |
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Strona 364
... areas are not pools at all , and are only capable of being treated effectively by some form of dry dust or powder . Among the methods of dealing with Mosquito - infested places can be mentioned . the treating of stagnant water with ...
... areas are not pools at all , and are only capable of being treated effectively by some form of dry dust or powder . Among the methods of dealing with Mosquito - infested places can be mentioned . the treating of stagnant water with ...
Strona 368
... Area " faces page 14 , and an analysis is made ( pages 11-14 ) of the treaties now in force which prevent many of the British countries in Africa from granting a preference on manufactured goods from Great Britain . The present tariffs ...
... Area " faces page 14 , and an analysis is made ( pages 11-14 ) of the treaties now in force which prevent many of the British countries in Africa from granting a preference on manufactured goods from Great Britain . The present tariffs ...
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