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Africa has about one-fourth of the world's reserves of bauxite, the chief aluminum
ore. Virtually all of this occurs in a major belt of tropical laterite stretching some
1,200 miles from Guinea to Togo. The largest reserves are in Guinea. Half of the
Many Midwestern farmers began growing hybrid corn in the late 1920s and
1930s, but it did not dominate corn production until World War II. In 1933, 1
percent of the total corn acreage was planted with hybrid seed. By 1939 the
figure was 15 ...
(2) The family Myobatrachidae includes what were formerly recognized as Old
World members of the Lep- todactylidae, a family now considered restricted to the
New World. (3) The Brachycephalidae, as recognized by Noble, included the ...
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The New Encyclopaedia Britannica (Encyclopaedia)User Review - Not Available - Book Verdict
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