ISBN 9780920230824 books & textbook
Trilobites Of The Marjuman And Steptoean Stages (upper Cambrian), Rabbitkettle Formation, Southern Mackenzie Mountains, Northwest Canada (Palaeontographica Canadiana)
Geological Assn of Canada /1992-09-30 Paperback / 179 Pages
isbn-10: 0920230822 / isbn-13: 9780920230824
