Scheldt species source details
Grigg, H., S.J. Bardwell & L.J. Holmes. (1987). Comparative observations on the biometry and development of Calanus finmarchicus and C. helgolandicus in copepodite stage V, with comments on other Calanidae. Marine Biology, Berlin 96(2):253-262.
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Grigg, H., S.J. Bardwell & L.J. Holmes
1987
Comparative observations on the biometry and development of Calanus finmarchicus and C. helgolandicus in copepodite stage V, with comments on other Calanidae.
Marine Biology, Berlin
96(2):253-262.
Publication
Available in Wilson Copepod Library (non-digital)
Available for editors 
Calanus helgolandicus helgolandicus (Claus, 1863) (additional source)