河北昌黎果区主要食虫鳥类的調查研究
By: Zheng Zuoxin ... [et al.] zhu
Publisher: Ke xue chu ban she
Published: 1958
Place of publication: Beijing
Language: chi
Number of pages: 135
Subjects: Birds
Other titles: Hebei Changli guo qu zhu yao shi chong niao lei de diao cha yan jiu
Notes: Bibliography: p. 119.

Summary in English.