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Reviewed: Sustainable Development in Mountain Regions: Southeastern Europe Edited by Georgi Zhelezov. Cham, Switzerland: Springer, 2016. xiv + 404 pp. Hardcover: US$ 129.00, ISBN 978-3-319-20109-2. E-book: US$ 99.00, ISBN 978-3-319- 20110-8.\udReviewed: Sustainable Mountain Regions: Challenges and Perspectives in Southeastern Europe Edited by Boian Koulov and Georgi Zhelezov. Cham, Switzerland: Springer, 2016. xvi + 268 pp. Hardcover: US$ 129.00, ISBN 978-3-319-27903-9. E-book: US$ 99.00, ISBN 978-3-319-27905-3

Sustainable Development in Mountain Regions: Southeastern Europe and Sustainable Mountain Regions: Challenges and Perspectives in Southeastern Europe