RYKOV, N.A. SHALAYEV, V.F.
ZOOLOGY : TEXTBOOK FOR THE VI th & VII th FORMS - Moscow Prosveshcheniye Publishing House, Moscow 1966
590 / SHA/ZO
ZOOLOGY : TEXTBOOK FOR THE VI th & VII th FORMS - Moscow Prosveshcheniye Publishing House, Moscow 1966
590 / SHA/ZO