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- [1] THE DISTRIBUTION OF C-14 ASSIMILATES IN WILD CHERVIL (ANTHRISCUS-SYLVESTRIS L) AND COW PARSNIP (HERACLEUM-SPHONDYLIUM L) AT DIFFERENT STAGES AND THE TIMING FOR EFFECTIVE HERBICIDE APPLICATION ZEITSCHRIFT FUR ACKER UND PFLANZENBAU-JOURNAL OF AGRONOMY AND CROP SCIENCE, 1980, 149 (01): : 35 - 45