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https://www.elsevier.com/books/quantitative-hydro-geoengineering/yihdego/978-0-12-813966-0 3
https://www.angusrobertson.com.au/books/quantitative-hydro-geoengineering-yohannes-yihdego/p/9780128139660 4
https://www.amazon.com/gp/product/0128139668/ref=x_gr_w_bb_sout?ie=UTF8&tag=x_gr_w_bb_sout20&linkCode=as2&camp=1789&creative=9325&creativeASIN=0128139668&SubscriptionId=1MGPYB6YW3HWK55XCGG2 5
https://books.google.com.au/books/about/Quantitative_Hydro_Geoengineering.html?id=sMlquQEACAAJ&source=kp_book_description&redir_ esc=y
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