TY  - RPRT
TI  - A Procedure for calibrating the magnification of an scanning electron microscope using NBS SRM 484 
AU  - Ballard, David B
PY  - 1977
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 77-1248
DO  - 10.6028/NBS.IR.77-1248
ER  -