The focal surfaces of the congruence formed by the tangents to the lines of curvature of a given surface .. Q Science
Over de verhouding van de speciale relativiteitstheorie tot de New toniaansche voorstellingen van ruimte en tijd; Q Science
Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic Q Science
Josephi Pitton Tournefort Aquisextiensis, doctoris medici Parisiensis … Institutiones rei herbariae Q Science
Josephi Pitton Tournefort Aquisextiensis, doctoris medici Parisiensis … Institutiones rei herbariae Q Science
Josephi Pitton Tournefort Aquisextiensis, doctoris medici Parisiensis … Institutiones rei herbariae Q Science
Mikroskopische Physiographie der Mineralien und Gesteine. Ein Hülfsbuch bei mikroskopischen Gesteinsstudien Q Science
