Tubifex /
Dixon, Gertrude C.
Tubifex / Gertrude C. Dixon. - London : Williams & Norgate, 1915. - 100 p. : ill. ; 25 cm. - Liverpool Marine Biology Committee Memoirs ; 23 .
Tubifex / Gertrude C. Dixon. - London : Williams & Norgate, 1915. - 100 p. : ill. ; 25 cm. - Liverpool Marine Biology Committee Memoirs ; 23 .