An optical method for determining level in two-phase cryogenic fluids
MLA
Oberle, Lawrence G, and Donald H Weikle. An Optical Method for Determining Level In Two-phase Cryogenic Fluids. [Washington, DC]: National Aeronautics and Space Administration , 1992
APA, 7th edition
Oberle, L. G, & Weikle, D. H. (1992). An optical method for determining level in two-phase cryogenic fluids. [Washington, DC]: National Aeronautics and Space Administration
Chicago, 17th edition
Oberle, Lawrence G., and Donald H Weikle. An optical method for determining level in two-phase cryogenic fluids. [Washington, DC]: National Aeronautics and Space Administration , 1992