?????? ?????? ?????????? ?? 21 2019
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- �Not all animals migrate by choice� ????????????? ???????????? ?.??. ????????????? ??????? ??????? ????????? ?????? ????????? ???? (WCCB) ??????? �??????? ??????.
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- ?????? ?????? ????????????? ????????? (????) ????????????????? ??????? ???????????? ?????????�???????.
- General Conference on Weights and Measures (CGPM) ?????????? ??????? ?????? ??????? ??????? ??????????? ???? ???????? ????????? ??????? ?????????????????.
- ????????????? ??????????? �?????? ???� ????????? ?????? ???????.
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Download PDF
?????? ?????????? � ?? 21 2019
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