ScienceJohn Michels (Journalist) 1939 |
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Стр. 83
... ment costs about $ 25.00 an acre , and a fumigation treat- ment costs about $ 35.00 an acre . It behooves the grower to know the various insects , their life history and seasonal history , their degree of susceptibility or immunity to ...
... ment costs about $ 25.00 an acre , and a fumigation treat- ment costs about $ 35.00 an acre . It behooves the grower to know the various insects , their life history and seasonal history , their degree of susceptibility or immunity to ...
Стр. 264
... ment of astronomy of the University of California at Los Angeles , will be visiting professor of astronomy in the summer session of the University of British Colum- bia , Vancouver , which will be in session from July 3 to August 18 ...
... ment of astronomy of the University of California at Los Angeles , will be visiting professor of astronomy in the summer session of the University of British Colum- bia , Vancouver , which will be in session from July 3 to August 18 ...
Стр. 421
... ment of Science ; The Fiftieth Anniversary of the Johns Hopkins Hospital Scientific Notes and News Discussion : Will Iodine Come to be Considered an Essential Plant Nutrient ?: PROFESSOR W. L. POWERS . Range Plant Newly Found to be ...
... ment of Science ; The Fiftieth Anniversary of the Johns Hopkins Hospital Scientific Notes and News Discussion : Will Iodine Come to be Considered an Essential Plant Nutrient ?: PROFESSOR W. L. POWERS . Range Plant Newly Found to be ...
Содержание
Sci 105 | 1 |
Philosophical Society American 382 E G CONKLIN 436 | 9 |
ALEXANDER J Science in the Old South | 12 |
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