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			1 | 
		
			
									
						The Manual of modern photography / Bd. 1. 1956, 2., rev. ed.
					
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			2 | 
		
			
									
						Unter heisser Sonne Frerk, Friedrich Willy. - Unterschondorf/Ammersee : Döring u. Vockrodt, 1956, 1. - 5. Tsd.
					
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			3 | 
		
			
									
						A little Guide to good photographs of children Nathrath, Paul. - Vaduz : Heering Publications, 1954
					
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			4 | 
		
			
									
						Films and filters Croy, Otto. - Vaduz : Heering, 1954
					
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			5 | 
		
			
									
						The Rollei Book Heering, Walther. - Seebruck am Chiemsee : Heering, 1954, 6. ed.
					
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			6 | 
		
			
									
						Tips for the box camera Knapmann, Rudolf. - Vaduz : Heering Publications, 1954
					
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			7 | 
		
			
									
						Flash Frerk, Friedrich Willy. - Barcelona : Ed. Omega, [1949?]
					
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			8 | 
		
			
									
						Los negativos Frerk, Friedrich Willy. - Barcelona : Ed. Omega, 1948, 2. ed.
					
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			9 | 
		
			
									
						Rolleiflex guide Frerk, Friedrich Willy. - New York : Transatlantic Arts, Inc., 1948, 5., American ed.
					
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			10 | 
		
			
									
						All about focusing and your camera Frerk, Friedrich Willy. - London : The Focal Press, 1942, 11. - 15. thous.
					
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