Hoffmann, G Christian 1837 1917 books & textbook
Report on Canadian graphite : with special reference to its employment as a refractory material
Hoffmann, G Christian 1837-1917
Ulan Press /2012-08-31 Paperback / 38 Pages
Chemical Contributions to the Geology of Canada. From the Laboratory of the Survey
Hoffmann, G Christian 1837-1917 Geological Survey of Canada
Palala Press /2015-09-10 Hardcover / 42 Pages
isbn-10: 1342221699 / isbn-13: 9781342221698
Paper on the eucalypts of Australia
Hoffmann, G Christian 1837-1917
Nabu Press /2010-08-17 Paperback / 46 Pages
isbn-10: 1177341123 / isbn-13: 9781177341127
