By Norman, David.
Barcelona : Juventud, 1987 .
61 p : il

Place hold on Dinosaurios y otros animales prehistóricos

By Bonnar, Ann.
Barcelona : Juventud, 1983 .
58 p : il

Place hold on Plantas de interior

By Glover, Harry.
Barcelona : Juventud, 1983 .
58 p : il

Place hold on Perros

By Henbest, Nigel.
Barcelona : Juventud, 1987 .
63 p : il

Place hold on El cielo de noche /

By Holden, Peter.
Barcelona : Juventud, 1981 .
57 p : il

Place hold on Aves

By Harris, Esmod.
Barcelona : Juventud, 1981 .
60 p : Il

Place hold on Arboles

By Ambrose, Barry.
Barcelona : Juventud, 1981 .
58 p : il

Place hold on Flores de jardín

By Humphries, Christopher.
Barcelona : Juventud, 1983 .
58 p ; il

Place hold on Flores silvestres

By Hyde, George E.
Barcelona : Juventud, 1983 .
68 p : il

Place hold on Mariposas

By Woolley, Alan.
Barcelona : Juventud, 1987 .
60 p : il

Place hold on Rocas y minerales

By Wootton, Anthony.
Barcelona : Juventud, 1995 .
64 p : il

Place hold on Insectos

By Saunders, Graham D.
Barcelona : Juventud, 1991 .
60 p : il

Place hold on Moluscos :

By Spector, Joanna.
Barcelona : Juventud, 1994 .
64 p : il

Place hold on Caballos y ponis

By Loxton, Howard.
Barcelona : Juventud, 1991 .
64 p : il

Place hold on Gatos

By Leutscher, Alfred.
Barcelona : Juventud, 1990 .
64 p : il

Place hold on Los animales, sus huellas y señales

By Ford, David.
Barcelona : Juventud, 1995 .
60 p : il

Place hold on Peces de acuario :

By Kidman Cox, Rosamund.
Barcelona : Juventud, 1991 .
64 p : il

Place hold on Animales del zoo

By Blosson, Joe.
Barcelona : Juventud, 1995 .
62 p : il

Place hold on Aves marinas y de agua dulce

By Holden, Peter.
Barcelona : Juventud, 1991 .
62 p : il

Place hold on Aves de presa /

By Wilson ; Francis, .
Barcelona : Juventud, 1994 .
64 p : il

Place hold on El tiempo