Piper, P. J., & Krell, R. D. Advances in the understanding and treatment of asthma.
Lua i Stíl Chicago (17ú heag.)Piper, Priscilla J., agus Robert D. Krell. Advances in the Understanding and Treatment of Asthma.
Lua MLA (8ú heag.)Piper, Priscilla J., agus Robert D. Krell. Advances in the Understanding and Treatment of Asthma.
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