List of Articles Seasonal variation Open Access Article Abstract Page Full-Text 1 - Metals Contamination of Groundwater Resources of Enugu North District, SouthEast Nigeria Vitus Agbazue Nwachukwu Ekere Benedict Ngang Janefrances Ihedioha 10.22034/jchr.2018.544196 Open Access Article Abstract Page Full-Text 2 - The Effect of Seasonal Variation on the Chemical and Microbial Quality of Raw Milk Samples Used in Qazvin, Iran Masoud Kazeminia Razzagh Mahmoudi Peyman Ghajarbygi Shagahyegh Moosavi 10.22034/jchr.2019.665825