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Iwenda Bella Subagio, .- and Edwin Setiawan, .- and Sucipto Hariyanto, .- and Bambang Irawan, .- (2017) Spicule size variation in Xestospongia testudinaria Lamarck, 1815 at Probolinggo Situbondo coastal. In: Proceeding of International Biology Conference 2016: Biodiversity and Biotechnology for Human Welfare. AIP Publishing, Surabaya, Indonesia, 020034-1. ISBN 978-0-7354-1528-7