Description of a projection device for use in age determination from fish scales.
Series: Fishery bulletin,; 54
Publisher: U.S. Dept. of the Interior, Fish and Wildlife Service
Published: 1950
Place of publication: [Washington]
Language: eng
Number of pages: 407
Subjects: Scales (Fishes); Fishes -- Age determination -- Equipment and supplies.
Notes: Cover title.
"From Fishery bulletin of the Fish and Wildlife Service, volume 51."