(1980). Scientific supplies catalogue. Karl Kolb Scientific-Technical Supplies.
Cita Chicago (17th ed.)Scientific Supplies Catalogue. Dreieich: Karl Kolb Scientific-Technical Supplies, 1980.
Cita MLA (9th ed.)Scientific Supplies Catalogue. Karl Kolb Scientific-Technical Supplies, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.