A manual of Philippine birds by McGregor, Richard Crittenden 1871-

A manual of Philippine birds Part I (Galliforms to Eurylaemiformes). by McGregor, Richard C.

A hand-list of the birds of the Philippine islands. by McGregor, Richard C. (Richard Crittenden), 1871-1936

II. Notes on three rare Luzon birds by McGregor, Richard Cittenden 1871-

On birds from Luzon, Mindoro, Masbate, Ticao, Cuyo, Culion, Cagayan, Sulu, and Palawan by McGregor, Richard Crittenden 1871-

Bulletins of the Philippine Museum by McGregor, Richard C.

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(viewed 26 April 2019)

Preliminary notes on the birds and mammals collected by the Menage Scientific Expedition to the Philippine Islands by Bourns, Frank S., Worcester, Dean Conant 1866-

Preliminary notes on the birds and mammals collected by the Menage Scientific Expedition to the Philippine Islands by F. S. Bourns and Dean C. Worcester. by Bourns, Frank Swift

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(viewed 17 May 2019)

Avifauna of Mount Makiling III by Alviola, Pedro L. III 1948-

Notes on recent collections of birds from Palawan and Busuanga.