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Langley, Samuel Pierpont Pritchard's Wedge Photometer
 Langley, Samuel Pierpont Pritchard's Wedge Photometer
Langley-Swain, Samuel MON AMI FLOCON: 3 an(s)
 Langley-Swain, Samuel MON AMI FLOCON: 3 an(s)
Langley, Samuel Pierpont The Temperature Of The Moon: From Studies At The Allegheny Observatory By S.p.langley, With The Assistance Of F.w.very
 Langley, Samuel Pierpont The Temperature Of The Moon: From Studies At The Allegheny Observatory By S.p.langley, With The Assistance Of F.w.very
Langley, Samuel Pierpont The new Astronomy
 Langley, Samuel Pierpont The new Astronomy
Langley, Samuel Pierpont