na INLIS000000000023558 Ind 0010-1218005396 Comparison of estimaties of egg production of the southern bicht cod stock from plankton surveys and market statistics DAAN, Niels Niels Daan Ijmuiden Netherlands Institute for Fishery Investigation 1976 28 p. : ill. ; 29 cm. 28 p. : ill. ; 29 cm. 639.223DAAc 674/80 639.223 EGG PRODUCTION PLANKTON mfn-25412