PALAEARCTIC MIGRANTS IN NIGERIA

[31] Serle W., 1957, Ibis, V99, P371, DOI 10.1111/j.1474-919X.1957.tb01958.x

[32] SERLE W, 1950, IBIS, V92, P84

[33] SERLE W, 1939, IBIS, V81, P654

[34] SERLE W, 1939, IBIS, V82, P1

[35] Serle W., 1957, IBIS, V99, P628

[36] Serle William, 1943, IBIS, V85, P413, DOI 10.1111/j.1474-919X.1943.tb03856.x

[37] Serle William, 1943, IBIS, V85, P264

[38] SPENCER ROBERT, 1959, IBIS, V101, P416, DOI 10.1111/j.1474-919X.1959.tb02397.x

[39] Voous KH, 1960, ATLAS EUROPEAN BIRDS

[40] WARD P., 1963, IBIS, V105, P109

[31] Serle W., 1957, Ibis, V99, P371, DOI 10.1111/j.1474-919X.1957.tb01958.x

[32] SERLE W, 1950, IBIS, V92, P84

[33] SERLE W, 1939, IBIS, V81, P654

[34] SERLE W, 1939, IBIS, V82, P1

[35] Serle W., 1957, IBIS, V99, P628

[36] Serle William, 1943, IBIS, V85, P413, DOI 10.1111/j.1474-919X.1943.tb03856.x

[37] Serle William, 1943, IBIS, V85, P264

[38] SPENCER ROBERT, 1959, IBIS, V101, P416, DOI 10.1111/j.1474-919X.1959.tb02397.x

[39] Voous KH, 1960, ATLAS EUROPEAN BIRDS

[40] WARD P., 1963, IBIS, V105, P109