Spiro Heterocycles. Part-VIII. Synthesis, Herbicidal and Fungicidal Activities of some New Fluorine-containing Spiro[3H-indole-3,4̷̷̷̷ 1̷H)-pyrano[2,3-c]pyrazole]- 5/-carbonitriles/carboxyethylesters - KRISHNA C. JOSHI (1988)