00271nam a2200097 a 450000500170000008200190001710000230003624500520005926000410011130000210015220251203090509.0  a639.2,bD, roy  aRoyce, William, F.  aIntroduction to the practice of fishery science  aOrlaNew DelhiobAcademic Pressc1984  axi, 428p, 21 cm.