TY  - RPRT
TI  - Noncontaminating method for visualizing gas flow
AU  - Stepka, F. S.
AU  - Poferl, D.
AU  - Goldstein, R. J.
PY  - 1976
UR  - https://ntrs.nasa.gov/citations/19760000088
ID  - 19760000088
ER  -