A
Amphibian populations  [1]
Amphibian populations -- Llobregat River Delta (Spain)  [1]
Amphibians -- Catalonia -- Daró (River)  [1]
Amphibians -- Effect of human beings on  [1]
Amphibians -- Genetics  [1]
Amphibians -- Habitat -- Llobregat River Delta (Spain)  [1]
Amphibians -- Peru -- San Rafael  [1]
Anaerobic bacteria -- Genetic aspects  [1]
Anaerobic bacteria -- Industrial applications  [1]
Anchovies -- Parasites  [1]
Anchovies -- Reproduction  [1]
Aneuploïdia  [1]
Aneuploidy  [1]
Animals invasors  [1]
Animals invasors -- Catalunya  [1]
Animals invasors -- Catalunya -- Llobregat, Delta del  [1]
Animals invasors -- Pirineu català  [1]
Animals salvatges en captivitat  [8]
Animals urbans -- Catalunya -- Girona  [1]
Antibiòtics pèptids  [1]
Antineoplastic agents  [2]
Ants  [1]
Ants -- Effect of fires on  [2]
Anxoves -- Paràsits  [1]