Boghen, Andrew D.2014-10-2119741974AAINK20163http://hdl.handle.net/10222/55177Thesis (Ph.D.)--Dalhousie University (Canada), 1974.Biology, General.The importance of phasic activity in a study on the effects of two digenetic trematodes on the digestive gland cells of Littorina saxatilis Olivi.text