共 50 条
- [32] PROPAGATION OF VIRUS-FREE POTATO PLANTS BY MEANS OF TUBERS OBTAINED INVITRO SOVIET PLANT PHYSIOLOGY, 1978, 25 (02): : 295 - 300
- [33] Determining Effective Methods of Obtaining Virus-Free Potato for Cultivation in Kazakhstan American Journal of Potato Research, 2020, 97 : 367 - 375
- [34] FACTORS AFFECTING SUGARBEET SEED-GERMINATION IN NORTH-AMERICA IIRB-INSTITUT INTERNATIONAL DE RECHERCHES BETTERAVIERES, 1975, 7 (01): : 1 - 9
- [36] A COMPARATIVE-ANALYSIS OF FARMLAND PRESERVATION PROGRAMS IN NORTH-AMERICA CANADIAN GEOGRAPHER-GEOGRAPHE CANADIEN, 1982, 26 (03): : 190 - 206
- [40] MARRIAGE AND FAMILY ENRICHMENT PROGRAMS IN NORTH-AMERICA - REPORT AND ANALYSIS FAMILY COORDINATOR, 1975, 24 (02): : 137 - 142