1. Manual of recommended practice for sanitary control of shellfish industry: pt. 2, Sanitation of harvesting and processing shellfish. Bookmark Corporate/Agency Authors: Public Health Service and Health, Education and Welfare Dept. Publisher: Public Health Service Date: [Revised 1957.] [1957.] SuDoc number: FS 2.6:Sh 4/957/pt.2 and FS 2.6/2:Sh 4/pt.2