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					Originally Posted by Martin Lubojacky
					
				 
				Hi Jim, 
Many thanks. I will try to find the book by Ortner. 
Best regards, 
Martin 
			
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Hi Martin,
You're welcome 

 The copies I found on line were horribly expensive! I'm not sure how things work these days with interlibrary loan but I used that extensively in the old days to get rare and out of print books and articles. Often Universities and other libraries actually have some of these weapons references, and once I had obtained the information I needed back they went. If there was enough to warrant, I at least knew if I needed it big bucks worth. 
All the best,
Jim