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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 | 
		
			
									
						Los positivos Frerk, Friedrich Willy. - Barcelona : Ed. Omega, [ca. 1950], 1. ed.
					
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			7 | 
		
			
									
						La mise au point Frerk, Friedrich Willy. - Paris : Editions Prisma, [1949]
					
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			8 | 
		
			
									
						El enfoque y vuestra cámera Frerk, Friedrich Willy. - Barcelona : Ediciones Omega, c 1948
					
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			9 | 
		
			
									
						Cruising with a camera Frerk, Friedrich Willy. - London : Focal Pr., 1939, 1. print.
					
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			10 | 
		
			
									
						Lichtbildkunde Frerk, Friedrich Willy. - Berlin S 14 [, Stallschreiberstr. 34/35] : Photokino-Verl.
					
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