SGEM 2019. 19th international multidisciplinary scientific geoconference. Vol. 19. Ecology, economics,education and legislation Issue: 5.4 28.6.-7.7.2019, Albena / rec. Valeriy Bondur, Raimonds Ersteins
Bondur, Valeriy (rec.) Ersteins, Raimonds (rec.)
SGEM 2019. Ecology, economics,education and legislation 19th 28.6.-7.7.2019 Albena
1.vyd
Sofia SGEM world science 2019 . - 420 s.
ISBN 978-619-408-87-4
ISSN 1314-2704
www.sgemworld.at
(2) - článok