The Reader's Digest, Volumen107Reader's Digest Association, 1975 |
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Growing Menace of Our Sinking Lands In numerous places throughout the world , land levels are drop- ping , sometimes gradually , sometimes suddenly . The problem is both serious and solvable 1975 THE GROWING MENACE OF OUR SINKING LANDS ...
Growing Menace of Our Sinking Lands In numerous places throughout the world , land levels are drop- ping , sometimes gradually , sometimes suddenly . The problem is both serious and solvable 1975 THE GROWING MENACE OF OUR SINKING LANDS ...
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... Land subsides for several reasons , according to hydrologist Joseph Poland of the U.S. Geological Sur- vey in Sacramento , a world author- ity on the problem . Much of the earth's surface is being warped up or down by natural forces ...
... Land subsides for several reasons , according to hydrologist Joseph Poland of the U.S. Geological Sur- vey in Sacramento , a world author- ity on the problem . Much of the earth's surface is being warped up or down by natural forces ...
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... land surfaces are gi- gantic sponges which have been sopping up and discharging water from rains and runoffs for millions of years . Because of its buoyancy and resistance to compression , the under- ground water serves as a hydraulic ...
... land surfaces are gi- gantic sponges which have been sopping up and discharging water from rains and runoffs for millions of years . Because of its buoyancy and resistance to compression , the under- ground water serves as a hydraulic ...
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July | 6 |
The Black SpotA Personal Encounter With Cancer | 49 |
How to Cope With Jealousy | 58 |
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