DIN EN 17655:2021 Conservation of cultural heritage - Determination of water absorption by contact sponge method; German and English version prEN 17655:2021
2022DIN EN 17655:2022-09 Conservation of cultural heritage - Determination of water absorption by contact sponge method; German version EN 17655:2022
2022DIN EN 17655:2022 Conservation of cultural heritage - Determination of water absorption by contact sponge method
2021DIN EN 17655:2021 Conservation of cultural heritage - Determination of water absorption by contact sponge method; German and English version prEN 17655:2021