TY - BOOK AU - Gurzadyan, G. A TI - Theory of interplanetary flights SN - 9782919875153 U1 - 521 GUR PY - 1996/// CY - Amsterdam PB - Gordon and Breach Publishers KW - Celestial mechanics KW - Interplanetary voyages KW - Space flight N1 - Includes bibliographical references (p. 375-379) and index ER -