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- strahler, arthur the earth science "new york: harper and row publishers, ١٩٦٣".

- srtahler, arthur and alan h. stahler, elements of physical geopgraphy "new york: hohn wiley and sons, ١٩٧٩".

- thrower, norman j. w., maps and man "new jersey, enlleweed cliffs: prentice hall, inc. ١٩٧٢".

- van dorn, william g., oeeanography and seamanship "new york: dodd, mead, ١٩٧٤".

- wyatt, stanley and kaler, james, principles of astronomy, "boston: allyn and bacon, inc., ١٩٧٤".

- zim, herbert s., stars, "new york: golden press, ١٩٧٥".

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