The date indicates the year written.

The city in brackets [...] indicates where Mr Brent first encountered the manuscript.

Bethencourt Alfonso, J.
"El Silbo Articulado en La Gomera"
Revista de Canarias No. 71
Nov. 8, 1881
[Berlin]

Bethencourt Alfonso, J. (Espinosa, Lajard, Bonnet, De Cavin, Alvarez Cruz)
"Opiniones de varios escritores, El lenguaje silbado en la Gomera"
1954
[Santa Cruz de Tenerife]

!Bethencourt, Jean de
"Traicté des Navigations" pg 222 (included on pg 3 of the preface)
1402-5, 1629
[Paris]

Bethencourt, Jean de (see "Whistled Languages" pg 7)
"Histoire de la Première Descouverte et Conquest de Canaries"
1402-5, 1630
[Paris]

Brown, A.S. (see Hooten)
"Madeira, Canary Islands and Azores" 8th ed.
1905
[Madrid]

*Busnel, R.-G.
"Information in the Human Whistled Language and Sea Mammal Whistling"
<University of California Press>
1966
[Washington, DC]

Busnel, R.-G./Classe, A.
"Whistled Languages"
1976
[Madrid]

!Casas, B. de las
"Historia de las Indias" (quote from Diodoro of Sicily in the preface)
1527
[Santa Cruz de Tenerife]

Castillo y Ruiz de la Vergara, P.A. del
"Descripción de las Canarias"
1686/1737
[Santa Cruz de Tenerife]

*Classe, A.
"Phonetics of the Silbo Gomero"
Vol. IX <Archivum Linguisticum>
1956
[London]

Classe, A.
"The Whistled Language of La Gomera"
<Scientific American>
1957
[Washington, DC]

!Classe, A.
"Extraño Lenguaje Silbado en Las Islas Canarias"
<El Correo de la Unesco>
Nov. 1957
[Madrid]

!Classe, A.
"The Silbo: Whistled Language of La Gomera"
<The New Scientist>
1958
[London]

Classe, A.
"La Fonetica del Silbo Gomero"
<Revista de Historia>
1959
[Madrid]

*Classe, A.
"Les langues sifflées, squelettes informatifs du langage"
A. Moles & B. Valencien (eds.)
Communications et Langages
Paris 1963
[Versailles]

Cousteau, J.-Y.
"Dolphins"
1975
[Los Angeles]

*Hasler, J.A.
"El lenguaje silbado"
Revista de la Universidad Veracruzana, no. 15
1960
[Washington, DC]

Hooten, E.A.
"The Ancient Inhabitants of the Canary Islands"
<Harvard African Studies> Vol. VII
1925
[Washington, DC]

*Lajard, M.
<Bulletin de la Societé d'anthropolgie de Paris 2, 469-483>
1891
[Paris]

Marín y Cubas, T.A.
"Historia de las siete Islas de Canaria"
1687/1694
[Santa Cruz de Tenerife]

Mercer, J.
"The Canary Islanders"
1980
[London]

National Geographic Magazine (Canary Islands)
April 1955

!Nowak, H.
"SILBO GOMERO Die Pfeifsprache der Kanaren Insel Gomera"
<Almogaren>
197(?)
[Berlin]

*Quedenfeldt, M. (Bethencourt Alfonso, Bolle, Fritsche, Manrique)
"Pfeifsprache auf der Insel Gomera"
<Zeitschrift für Ethnologie> XIX
1887
[Berlin]

Ricard, R.
"Apropos du Language Sifflé des Canaries"
<Hesperis> XV
1, 1932
[Madrid]

Sebeok, Thomas A. (editor)
"Speech Surrogates: Drum and Whistle Systems"
MOUTON, The Hague - Paris
1976
[La Laguna, Tenerife]

Siemens Hernandez, L.
"Instrumentos de sonido entre los habitantes pre-hispanicos de Las Islas Canarias"
<Anuario de Estudios Atlanticos>
1969
[Madrid]

Trujillo, R.
"EL SILBO GOMERO análisis lingüístico"
1978
[Madrid]

!Verneau, R.
"Cinq Années de Sejour aux Isles Canaries"
1891
[Paris]

!Verneau, R.
"Le Langage sans Paroles"
<L'Anthropologie> Tome XXXIII
1923
[Madrid]

Wölfel, D.J.
"Los Gomeros vendidos por Pedro de Vera y Beatrix de Bobadilla"
<El Museo Canario Band 1>
1930
[Berlin]

!Wölfel, D.J.
Monumenta Lingua Canarie (pages 395-8)
<Akademische Druck- und Verlagsanstalt>
1965
[Berlin]