Quizá quiso decir: Topics in Heterocyclic Chemistry, 1861-9282 ; 4 Topics in Heterocyclic Chemistry, 1861-9282 ; 6 Topics in Heterocyclic Chemistry, 1861-9282 ; 3 Topics in Heterocyclic Chemistry, 1861-9282 ; 5 Topics in Heterocyclic Chemistry, 1861-9282 ; 1 Topics in Heterocyclic Chemistry, 1861-9282 ; 17 Topics in Heterocyclic Chemistry, 1861-9282 ; 19 Topics in Heterocyclic Chemistry, 1861-9282 ; 8 Topics in Heterocyclic Chemistry, 1861-9282 ; 7 Topics in Heterocyclic Chemistry, 1861-9282 ; 9 Topics in Heterocyclic Chemistry, 1861-9282 ; 10 Topics in Heterocyclic Chemistry, 1861-9282 ; 11 Topics in Heterocyclic Chemistry, 1861-9282 ; 12 Topics in Heterocyclic Chemistry, 1861-9282 ; 13 Topics in Heterocyclic Chemistry, 1861-9282 ; 14 Topics in Heterocyclic Chemistry, 1861-9282 ; 15 Topics in Heterocyclic Chemistry, 1861-9282 ; 16 Topics in Heterocyclic Chemistry, 1861-9282 ; 20 Topics in Heterocyclic Chemistry, 1861-9282 ; 18 Topics in Heterocyclic Chemistry, 1861-9282 ; 21