Illusteret Dansk Konversations Leksikon – 11 volumes

Presumably first editions, missing some volumes. Text in Danish, illustrated throughout, 1930s. In fair condition. 

Volumes include:

3: Berlin Braga

4: Bragança Carta

7: Dragtsadel Euklid 

8: Eulan Fromentin

10: Gulmann Hjultryk

11: Hjulvindue Japan

12: Japan Klos

15: Matematiske Neurom

16: Neuron Pavane

20: Smykke Svovlsyre

21: Svovlsyre Triose