The World Book Encyclopedia, Tom 4Field Enterprises Educational Corporation, 1960 |
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Strona 170
... animals that ever stalked the earth . The word dinosaur comes from the Greek words dinos , meaning terrible , and ... animals . This work re- quires a thorough knowledge of the body structure of living animals , and of the relation ...
... animals that ever stalked the earth . The word dinosaur comes from the Greek words dinos , meaning terrible , and ... animals . This work re- quires a thorough knowledge of the body structure of living animals , and of the relation ...
Strona 186
... Animals Animal diseases are important both in themselves and as they affect man , who shares a number of infec- tions with the animals . The danger of such exchanges should never be forgotten . Rat - killing campaigns should always be ...
... Animals Animal diseases are important both in themselves and as they affect man , who shares a number of infec- tions with the animals . The danger of such exchanges should never be forgotten . Rat - killing campaigns should always be ...
Strona 286
... Animals . The scientific use of drugs from animal parts is rather recent . Animal drugs became im- portant when scientists discovered that some diseases are caused when glands in the human body do not function properly . Scientists ...
... Animals . The scientific use of drugs from animal parts is rather recent . Animal drugs became im- portant when scientists discovered that some diseases are caused when glands in the human body do not function properly . Scientists ...
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