Citace podle APA (7th ed.)
Khalid, A. Water supply in republic of Yemen. Modern state and directions of perfection.
Citace podle Chicago (17th ed.)Khalid, Abdo. Water Supply in Republic of Yemen. Modern State and Directions of Perfection.
Citace podle MLA (8th ed.)Khalid, Abdo. Water Supply in Republic of Yemen. Modern State and Directions of Perfection.
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