Tōmō no gyogu to gyohō
By: Gunma Kenritsu Hakubutsukan hen
Series: Gunma Kenritsu Hakubutsukan kenkyū hōkoku -- dai 10-shū
Publisher: Gunma Kenritsu Hakubutsukan
Published: 1975
Place of publication: Tomioka-shi
Language: jpn
Number of pages: 74
Subjects: Fisheries; Equipment and supplies