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Ringneck Parakeets, The Complete Owner's Guide to Ringneck Parrots, Including Indian Ringneck Parakeets, their Care, Breeding, Training, Food, Lifespan, Mutations, Talking, Cages and Diet : Sullivan, Rose: Amazon.com.au: Books
Rose-ringed Parakeets (Psittacula krameri)
Indian Ring-Necked Parakeet Personality, Food & Care – Pet Birds by Lafeber Co.