TY  - BOOK
AU  - Beecher,Charles Emerson
TI  - Outline of natural classification of the Trilobites
AV  - QE821 .B418
PY  - 1897///]
CY  - [New Haven
KW  - Trilobites
N1  - "From the American journal of science, vol. III, March, 1897."
ER  -