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3. Effect of khat extract, d-cycloserine and thalidomide on deoxyribonucleic acid (DNA) of the neurons of 7 and 19 days chick embryo;Hammouda;Bull. Fac. Sci., Riyadh Univ.,1972
4. Effect of dietary khat extract on the testis of the white leghorn Gallus domesticus;Hammouda;Bull. Fac. Sci., K.A.U. Jeddah,1978
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