1973-1989 The Second (Abstracts) / The Fourth (Abstracts) / The Fifth (Program & Abstracts) / The Sixth (Program, Abstracts & Field Trips) / The Ninth (Abstracts & Field Trips) / The Tenth (Program, Abstracts & Field Trips). In all 12 small booklets with printed wrappers.We added: First Indian Symposium of Odonatology, 1984. Programme, Abstracts & Souvenir (23 p.) & Second Indian Symposium of Odonatology, 1986 (35 p.).