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1. كتاب
The Earth's Physical Resources. Block 5, Water Resources. by Series: S26
Publication details: Open U.P., 1974
Availability: Items available for loan: العلوم - الارض (5).

2. كتاب
Environmental Control and Public Health. Units 7-8. by Series: PT272
Publication details: Open U.P., 1975
Availability: Items available for loan: العلوم - الارض (1).

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