Grüninger, W., & Monge-Nájera, J. (1988). Use of the temperate lichen Hypogymnia physodes (Parmeliaceae) to evaluate air pollution in the Tropics. Universidad de Costa Rica.
Chicago Style CitationGrüninger, Werner, and Julián Monge-Nájera. Use of the Temperate Lichen Hypogymnia Physodes (Parmeliaceae) to Evaluate Air Pollution in the Tropics. Universidad de Costa Rica, 1988.
MLA CitationGrüninger, Werner, and Julián Monge-Nájera. Use of the Temperate Lichen Hypogymnia Physodes (Parmeliaceae) to Evaluate Air Pollution in the Tropics. Universidad de Costa Rica, 1988.
Warning: These citations may not always be 100% accurate.