Thank you! Especially useful is The Art and Skill of Radiotelegraphy
by William G. Pierpont
http://www.qsl.net/n9bor/n0hff.htm


For morse code neophytes at mac computers what free audio morse code
listening practice web links are there?... especially but not
necessarily limited to audio that can be heard on the web without
downloading into listeners' local computers
.. for neophytes
.. for mac
.. free

.. web based
.. not downloaded