Shah, A.; A. Shah, A. Spectroscopic Studies and Keto-Enol Tautomeric Effect of Newer Schiff Bases of Ortho-Hydroxy-Benzaldehyde Naphthaldehyde With 1,2-Phenylenediamine and 4-Aminophenyl Ether. ajc 2013, 25, 4215-4218.