T͡Siklichnost na nauchno-tekhnicheskii͡a progres
By: Ilii͡a Bozhkov.
Publisher: [s.n.]
Published: 1996
Place of publication: Plovdiv
Language: bul
Number of pages: 160
Subjects: Technological innovations -- History.; Science and industry.
Notes: Includes bibliographical references (p. 158-160).