Sponges of the middle cambrian Burgess shale and Stephen formations, British Columbia /
Rigby, J. Keith,
Sponges of the middle cambrian Burgess shale and Stephen formations, British Columbia / J. Keith Rigby, Desmond Collins. - 155 páginas : ilustraciones. - ROM contributions in science; no. 1 .
088854443X
ESPONJAS--FOSILES.
PALEONTOLOGIA--CAMBRICO.
563.4
Sponges of the middle cambrian Burgess shale and Stephen formations, British Columbia / J. Keith Rigby, Desmond Collins. - 155 páginas : ilustraciones. - ROM contributions in science; no. 1 .
088854443X
ESPONJAS--FOSILES.
PALEONTOLOGIA--CAMBRICO.
563.4