Agrekon. 1999;38(1):1-12. doi: 10.1080/03031853.1999.9523542 Q21.62025
CATTLE IMPROVEMENT SCHEMES IN SOUTH AFRICA: MEASURING THE RETURNS TO RESEARCH INVESTMENTS / BEPALING VAN DIE OPBRENGS OP NAVORSINGSINVESTERING IN VEEVERBETERINGSKEMAS IN SUID-AFRIKA
南非的牛改良计划:研究投资回报的衡量/南非贝帕林·范·迪·奥勃朗斯的牛改良投资
DOI: 10.1080/03031853.1999.9523542
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