Spectroscopic and chromatographic techniques for the forensic discrimination of laser-jet printer toners / by Umi Kalthom Ahmad, author, Widyaratih Hafizah Mechor, 1987-, author, Asian Conference on Analytical Science (10th : 2009 : Kuala Lumpur)

Enhancement of natural organic removal from raw water and treated water using Zeolite / by Umi Kalthom Ahmad, author, Roslan Omar, author, Widyaratih Hafizah Mechor, 1987-, author, Environmental Science and Technology Conference (ESTEC2009) (2009 : Terengganu)

KIMIA ANALISIS / by Alias Mohd. Yusof, author 220533, Azli Sulaiman, author 589166, Hashim Baharin, author 616759, Jafariah Jaafar, author 604333, Mohd. Marsin Sanagi, author 518130, Mohamed Noor Hasan, author 568741, Mohd. Shahru Bahari, author 1956- 189920, Mustaffa Nawawi, author 454388, Rahmalan Ahmad, author 528194, Razali Ismail, author 225727, Rugayah Mohamed, author 361762, Umi Kalthom Ahmad, author 561482, Wan Aini Wan Ibrahim, author 569669