TY  - RPRT
TI  - A key to the anuran tadpoles of the United States and Canada
AU  - R. Altig
AU  - R.W. McDiarmid
AU  - K.A. Nichols
AU  - P.C. Ustach
PY  - 1998
UR  - https://pubs.usgs.gov/publication/5224664
ID  - 5224664
ER  -