Development (1) Diseases (1) Time (1) Spring (1) Production (Economic theory) (1) Polonaises (1) Polish people (1) Milk plants (1) Farmers (1) Dairying, Cooperative (1) Dairy products (1) Dairy plants (1) Commercial products (1) Collectivism (1) Causation (1) Subsidies (1) Management (1) Technique (1) Prices (1) Quality (1) Leche--Producción (1) Cooperativas lácteas (1) Centrales lecheras (1) Agricultores (1) Morbilidad (1) Primavera (1) Colectivismo (1) Causalidad (1) Producción (1) Precios (1)