Findings:

• The Narrow Road to the Deep North
• narrow (user)
• the directing sign on the straight and narrow highway
• Nuns fret not at their convent's narrow room
• the narrow foot
• life with a narrow heel
• vice admiral of the narrow seas
• The Narrow Road Between Desires
• spectra
• Decay Associated Spectra
• time resolved emission spectra
• line spectra
• Stellar Spectra
• aerial spectra
• Spectra hoax
• Admiral of the Narrow Seas
• Straight but not Narrow
• narrow gauge
• Too Narrow
• Words are a narrow channel
• The narrow house
• Verrazano Narrows Bridge
• The Narrow Gate
• Tacoma Narrows Bridge
• narrow
• Shall I say, I have gone at dusk through narrow streets
• A narrow Fellow in the Grass
• The Straight And The Narrow
• narrow transcription
• Narrow Bandwidth Television Association
• The Narrows
• 1987 Whittier Narrows Earthquake
• Narrow gauge railways of Switzerland

If you Log in you could create a "narrow spectra" node. If you don't already have an account, you can register here.