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With so diverse an output there is no means of making a meaningful percentage
breakdown of program categories, but Soviet radio on the whole devotes more
time to information, educational, and cultural programs and less to entertainment
Mining and mineral processing account for 3 percent of its labour force but nearly
20 percent of the production value of British Columbia's major industries. Mines
are located throughout the province and include open-pit coal mines in the ...
Potassium is an essential ingredient of fertilizers. The potassium content of plants
varies considerably, but it is ordinarily in the range of 0.5 to 2 percent. In man, the
ratio of potassium between the cell and plasma is approximately 27 : 1 .
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review
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For virtually all its 238 years,Britannica has ruled the shelves as a peerless general encyclopedia. Reviewers have consistently given it high marks for most of the 12 criteria identified inKister's ... Read full review