Deteksi Kemurnian Air Zamzam Menggunakan Metode Spektrofotometri Near Infra Red (NIR) dan Kemometrik (Detection of Zamzam Water Purity Using Near Infra Red Spectroscopy (NIR) and Chemometrics) - Hidayah, Irwin Ulil (UPT Penerbitan Universitas Jember, 2014)