Naze dōshite kyōryū zukan
Subtitle: ōmukashi no ikimono no nazo ni semaru
By: Hirayama Ren kanshū
Contributors: Hattori, Masato, ill
Series: Tanoshii Shirabe Gakushū shirīzu; Tanoshii Shirabe Gakushū shirīzu
Publisher: PHP Kenkyūjo
Published: 2015
Place of publication: Tōkyō
Language: jpn
Number of pages: 63
ISBN-13: 9784569784458
Subjects: Dinosaurs; Mammoths; Fossils; Behavior; Encyclopedias; Juvenile Encyclopedias; Extinction
Other titles: Ōmukashi no ikimono no nazo ni semaru