na INLIS000000000003099 20241021022720 0010-1118003099 241021 | | | Structures assisting the migrations of non-salmonid fish : USSR / D.S. Pavlov PAVLOV, D.S. Rome : FAO, 1989 vii, 97 p. : ill. ; 30 cm. 92-5-102857-5 Sr.FAO 639.2.21 Bibl. p. 80-88 639.2.21 FISHES ANIMAL MIGRATION 1029/FAO/90