The New Encyclopędia BritannicaEncyclopędia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 20
... important in the develop- ment of soil fertility and also act as intermediate hosts for important tapeworm parasites of domestic animals . Rocky Mountain spotted fever , a rickettsial disease that occurs in the United States , is ...
... important in the develop- ment of soil fertility and also act as intermediate hosts for important tapeworm parasites of domestic animals . Rocky Mountain spotted fever , a rickettsial disease that occurs in the United States , is ...
Page 170
... important items of the national product , accounting for about 50 percent of its total value . The total arable area has been calculated to be 19,892,000 acres ( 8,050,000 hectares ) . Since much of the land is arid or semi - arid ...
... important items of the national product , accounting for about 50 percent of its total value . The total arable area has been calculated to be 19,892,000 acres ( 8,050,000 hectares ) . Since much of the land is arid or semi - arid ...
Page 201
... important because of its use in the cement industry , and deposits are fairly widespread . North Africa is a particularly important source . In West Africa a belt of limestone runs from the Central African Republic to the Atlantic ...
... important because of its use in the cement industry , and deposits are fairly widespread . North Africa is a particularly important source . In West Africa a belt of limestone runs from the Central African Republic to the Atlantic ...
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accelerator acid activity Adams administrative advertising Aeschylus aesthetic Africa agriculture animals appear become body called Central century changes contains continued cost countries crops cultural dance early East effect electrons elements engineering established example farm feet field figures flight followed function human important increase industry influence Italy Khoisan Knossos known Lake land languages later less living major materials means ment natural occur operations organization original patterns percent performance period plants play political population present production range region remains represented result River society sound South southern species structure style theory tion traditional United usually variety West Western widely