Analysis of Soil by Magnetic Field Assisted Calibration-Free Laser Induced Breakdown Spectroscopy (CF-LIBS) and Laser Ablation – Time-of-Flight Mass Spectrometry (LA-TOF-MS). - Akhtar, Mahmood; Jabbar, Abdul; Mahmood, Shaukat; Umar, Zeshan Adeel; Ahmed, Rizwan; Aslam Baig, Muhammad (Analytical Letters, 2019)