@misc{indiciae73a55f1a7e79, title = {Introduction: multiple stressors and declining amphibian populations: evaluating cause and effect}, author = {G. Linder and S.T. Branca and D. W. Sparling and S.K. Krest}, year = {2003}, url = {https://pubs.usgs.gov/publication/5211240}, note = {Source identifier: 5211240} }