John L. Clark
Curriculum renewal in school foreign language learning
Blues on Stage
Floristic checklist of the Mache-Chindul mountains of northwest Ecuador
Floristic checklist of the Mache-Chindul mountains of northwestern Ecuador
Improving the quality of learning
Roots of Western Swing
Stone monuments of the Guatemalan Piedmont and Chiapas =
Systematics of Glossoloma (Gesneriaceae)