Oddi wrth Wicipedia, y gwyddoniadur rhydd.
	    
	    	    	    
	    
Gall y ffeil hon gael ei defnyddio gan nifer o brosiectau eraill.
| Description |  | 
| Source | own code according to Construction Details (Government of the District of Columbia, untitled monograph, 1963, pp. 21-23. | 
| Date | July 14, 2006 | 
| Author | (of code) cs:User:-xfi- | 
| Permission | Public domain – self, Previous file was PD-OpenClipart | 
| This image shows a flag, a coat of arms, a seal or some other official insignia. The use of such symbols is restricted in many countries. These restrictions are independent of the copyright status. | 
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