TY  - RPRT
TI  - Method and apparatus for aligning a laser beam projector Patent
AU  - Allen, L. H.
AU  - Shumate, M. S.
AU  - Westphal, J. A.
PY  - 1971
UR  - https://ntrs.nasa.gov/citations/19710019649
ID  - 19710019649
ER  -