TY  - RPRT
TI  - Low voltage electron microscopy--how low?
AU  - J E Barth
AU  - J B Le Poole
DO  - 10.1016/0304-3991(76)90054-1
UR  - https://pubmed.ncbi.nlm.nih.gov/1028204/
ID  - 1028204
ER  -