2016 Shahmeister - Logarithms 5th ed ru 0A27B153143BE08466B38A8E02D22AAB 2003 Geidman - Logarithmical and Power Equations and Inequalities ru 6F3AAD6D70C678C68FBE880913598F66 7C2FA8BA9BEB382BD866DBE206127F7C