TY  - RPRT
TI  - Interstellar extinction by graphite, iron and silicate grains.
AU  - N C Wickramasinghe
AU  - K Nandy
PY  - 1970
DO  - 10.1038/227051a0
UR  - https://pubmed.ncbi.nlm.nih.gov/16057822/
ID  - 16057822
ER  -