Encyclopaedia Britannica 1911: Articles on Greek Theatre and its Dramatists

Aeschylus

https://archive.org/stream/EB1911WMF/VOL01_A-ANDROPHAGI#page/n307/mode/1up

1911 Encyclopædia Britannica-Aeschylus - Wikisource

Aristophanes

https://archive.org/stream/EB1911WMF/VOL02_ANDROS-AUSTRIA#page/n536/mode/1up

1911 Encyclopædia Britannica-Aristophanes - Wikisource

Euripides

https://archive.org/stream/EB1911WMF/VOL09_EDWARDES-EVANGELICAL_ASSOCIATION#page/n932/mode/1up

Sophocles

https://archive.org/stream/EB1911WMF/VOL25_SHWEBO-SUBLIMINAL_SELF#page/n438/mode/1up

Greek Literature

https://archive.org/stream/EB1911WMF/VOL12_GICHTEL-_JOHANN-HARMONIUM#page/n535/mode/1up

http://www.gutenberg.org/files/38202/38202-h/38202-h.htm#ar2

1911 Encyclopædia Britannica-Aristophanes - Wikisource, the free online library

Theatre

https://archive.org/stream/EB1911WMF/VOL26_SUBMARINE_MINES-TOM-TOM#page/n765/mode/1up

A Synoptic Guide to Ancient Greek Theatre in the Encyclopaedia Britannica, 11th Edition (1910-1911)