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			1 | 
		
			
									
						An introduction to probability theory and its applications / Vol. 1. 1950
					
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			2 | 
		
			
									
						Dating the past Zeuner, Frederick Everard. - London : Methuen, 1950, 2. ed., rev. and enlarged
					
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			3 | 
		
			
									
						Introduction to linear algebra and the theory of matrices Schwerdtfeger, Hans. - Groningen : Noordhoff, 1950
					
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			4 | 
		
			
									
						The question of lay analysis Freud, Sigmund. - New York, NY : Norton, 1950, 1 ed.
					
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			5 | 
		
			
									
						Introduction to psycho-analysis for teachers Freud, Anna. - London : Allen & Unwin, 1949, 2. impr.
					
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			6 | 
		
			
									
						Introduction to radiochemistry Friedlander, Gerhart. - New York : Wiley, 1949
					
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			7 | 
		
			
									
						Introduction to the theory of finite groups Ledermann, Walter. - Edinburgh : Oliver and Boyd, 1949, 1. publ.
					
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			8 | 
		
			
									
						Introduction to the differential equations of physics Hopf, Ludwig. - New York : Dover Publications, 1948
					
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			9 | 
		
			
									
						Bird display and behaviour Armstrong, Edward Allworthy. - London : Drummond, 1947, Rev. and enlarged ed. of "Bird display"
					
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			10 | 
		
			
									
						Introduction to aerodynamics of a compressible fluid Liepmann, Hans Wolfgang. - New York, NY : Wiley, 1947
					
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