sentences:  In the late 19th and early 20th century, beer rapidly grew in popularity among the Bulgarian middle class, and a large number of beer houses were established in most big cities.After World War I, there were already 18 breweries in Bulgaria.Besides those already mentioned, these included the Stara Zagora factory of Dr. Kozhuharov (since 1902), the Czechs Malotin and Hozman's factory in Lom, the Habermann and St Petka breweries in Rousse, the German Moritz Ratt's Cherven Rak factory in Pleven, W. Ollinger's in Koshava, others in Veliko Tarnovo and Gorna Oryahovitsa, etc.