|   | 
				
					
	
		
 Roberts, D. H. | 
	 
	
		| Volume | 
		Paper Title | 
		Page Number | 
		Authors | 
	 
			
			| 144 | 
			A Multi-Frequency VLBI Polarization Study of the CSS Quasar 3C 309.1 | 
			105 | 
			Aaron, S. E.; Wardle, J. F. C.; Roberts, D. H. | 
		 
			
			| 144 | 
			Detection of Parsec-Scale Circular Polarization with the VLBA | 
			123 | 
			Homan, D. C.; Wardle, J. F. C.; Ojha, R.; Roberts, D. H. | 
		 
			
			| 144 | 
			Evolution of the Parsec-Scale Structures of OJ 287 and 3C 273 | 
			127 | 
			Ojha, R.; Homan, D. C.; Roberts, D. H.; Wardle, J. F. C. | 
		 
			
			| 144 | 
			VLBA Imaging of a Large Sample of Blazars | 
			159 | 
			Attridge, J. M.; Roberts, D. H.; Wardle, J. F. C. | 
		 
	 
					 
				 | 
				  |