Literatura e Ambiente. II, Encontro de Estudos sobre Ciências e Culturas.
Softcover, Porto: Edições Fundaçâo Fernando Pessoa, 2005. Very Good with no dust jacket.
Softcover, Porto: Edições Fundaçâo Fernando Pessoa, 2005. Very Good with no dust jacket.
Hardcover, Moskva: Izdatelstvo Sovremennik, 1979. Good with no dust jacket.
Soft Cover, Kiev: Feniks, 2000. Good with No dust jacket as issued.
Softcover, São Paolo: Ática; Minas de livros, 1984. Very Good with no dust jacket.
Softcover, São Paolo: Global Edítora, 1989. Very Good with no dust jacket.
Softcover, Moskva: Ministerstva Selskogo Khozyaistva SSSR, 1971. Good with no dust jacket.
Hardcover, Toronto: Weller Publishing Company, 1973. Very Good with no dust jacket.
Hardcover, Rio De Janeiro: Editora Nova Fronteira S.A., 2001. Very Good+ in Very Good+ dust jacket.
Hardcover, Princeton, NJ: Princeton University Press, 1948. Very Good in Good dust jacket.
Softcover, Guadalajara, Spain: Junta de Comunidades de Castilla-La Mancha, 1992. Very Good with no dust jacket.
Softcover, Madrid: Universidad Nacional de Educacion a Distancia Facultad de Filologia, 1984. Very Good with no dust jacket.
Hardcover, Madrid: Consejo Superor De Investigaciones Cientificas, 1961. Good with no dust jacket.
Softcover, Madrid: Santillana Ediciones Generales, 2003. Fourteenth Edition. Very Good with no dust jacket.
Hardcover, New York: Pantheon Books, 1961. Second Printing. Good in Good dust jacket.
Hardcover, Moskva: Izdatelstvo Detskaya Literatura, 1965. Good with no dust jacket.
Softcover, São Paulo: Editora 34, 1997. First Edition. Very Good with no dust jacket.
Hard Cover, Moskva: Sovestskii Pisatel, 1965. Good with no dust jacket.
Softcover, Grenoble, France: Éditions Jérôme Millon, 2003. Very Good in Very Good dust jacket.
Hardcover, Paris: Annales Litteraires De l'Universite De Besancon, 1970. Good with no dust jacket.
Softcover, Firenze, Italy: Centro Didattico Nazionale Di Studi e Documentazione, 1970. First Edition. Very Good in Very Good dust jacket.
Softcover, London: Nase Delo, 1973. Good with No dust jacket as issued.
Softcover, München: Delphin-Verlag, 1921. Good with No dust jacket as issued.
Softcover, Alicante, Spain: Universidad de Alicante, 1985. Very Good with No dust jacket as issued.
Softcover, Alicante, Spain: Universidad de Alicante, 1987. Very Good with No dust jacket as issued.
Soft Cover, Madrid, España: Origenes, 1984. Very Good with no dust jacket.