فهرس المقالات Phosgene-free synthesis حرية الوصول المقاله صفحة الملخص نص كامل 1 - Understanding the role of acid sites of Zinc Aluminophosphate catalysts in eco-friendly synthesis of carbamates Hamza Annath Vijayasankar Viswambaram Aloor Nagaraju Narasimhaiah