What has the author Robert Shafer written?

Robert Shafer has written:

'Vergleichende Phonetik der karaibischen Sprachen' -- subject(s): Cariban languages, Phonetics

'Bibliography of Sino-Tibetan languages' -- subject(s): Sino-Tibetan languages, Bibliography

'Sino-Tibetan linguistics' -- subject(s): Sino-Tibetan languages, Phonology