00259nam a2200097Ia 450000500170000000800410001705000150005810000180007324500360009126000340012720251229124433.0251229s9999    xx            000 0 und d  aTX 392 .W9  aTyson , W .J. 0aFood for a future.cW .J Tyson   aLondonb Davis- poynterc1975