Электронный каталог

Книга

2nd National Forum on Contemporary Space Research (NaFSKI 2021), Sofia, Bulgaria, October 7-9, 2021 [Electronic resource]. – Bristol : IOP Publishing, 2022. – Electronic book. – (Journal of Physics: Conference Series ; Vol.2255). – URL: https://iopscience.iop.org/issue/1742-6596/2255/1. – Title from the title screen.

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Географический = Sofia, Bulgaria