Number 20

Authors: Bisret Narula , Vinod Beniwal

Authors: Soumik Das , Monalisa Banerjee , Atal Chaudhuri

Authors: Paresh Rawat , Jyoti Singhai

Authors: Amritpal Singh , V. P Singh

Authors: Sanjay Kr Singh , D. S. Chauhan , B. K. Kaushik , Vaibhav Dipankar , Navneet Kr. Chaurasia

Authors: M. Deva Priya , M. L Valarmathi , V. Sundarameena

Authors: Asmae El Ghadouali , Oulaid Kamach , Benaissa Amami

Authors: M. Amroune , A. Bourzami , T. Bouktir