Bertrand P. Helm has written:
'Time and reality in American philosophy' -- subject(s): American Philosophy, History, Time
P. J Helm has written: 'History of Europe, 1450-1660' -- subject(s): History
P. Y. Bertrand has written: 'Les noms des plantes au Maroc' -- subject(s): Botany, Nomenclature
P. Bertrand has written: 'Bassin houiller de la Sarre et de la Lorraine' -- subject(s): Coal, Fossil Ferns, Paleobotany
J. P. Bertrand has written: 'Timber wolves' -- subject(s): History, Crown lands, Pulpwood industry, Lumber trade, Forest products industry
P. Weerasekera has written: '\\'
P. P. Adamovich has written: 'Krasnye orly'
P. Gresswell has written: 'Environment'
P. Ispirescu has written: 'Basme'
P. Senart has written: 'Ionesco'
P. Becher has written: 'Emulsions'
I. P. Usharenko has written: 'Pirogov'
A. P. Vedeneev has written: 'Zveno'