DIN 53749:1970 Chemical Analysis of Urea-, Thiourea- and Melamine-formaldehyde Resins and Aminoplastic Moulding Materials in the Moulded and Unmoulded State
1970DIN 53749:1970 Chemical Analysis of Urea-, Thiourea- and Melamine-formaldehyde Resins and Aminoplastic Moulding Materials in the Moulded and Unmoulded State