. . "Aves Liberia." . . . . . "Classification" . . . . "Birds from Liberia, with a discussion of barriers between Upper and Lower Guinea subspecies"@en . . . . . "Birds from Liberia with a discussion of barriers between Upper and Lower Guinea subspecies"@en . . . . . "Birds from Liberia : with a discussion of barriers between upper and lower Guinea subspeices" . . . "Birds from Liberia" . "Birds from Liberia"@en . . . "Birds from Liberia, with a discussion of barriers between Upper and Lower Guinea subspecies. Austin L. Rand" . "Birds from Liberia : with a discussion of barriers between upper and lower Guinea subspecies" . . . "Birds from Liberia : with a discussion of barriers between Upper and Lower Guinea" . "Birds from Liberia : with a discussion of barriers between upper and lower Giunea subspeices" .