Essential Windows 3.1 /

द्वारा Duffy, Tim
प्रकाशित 1993

Essential DOS 3.3 /

द्वारा Duffy, Tim
प्रकाशित 1992

Human ecology of the tropical forests : report of a conference held ... 30th January to 1st February, 1987 [at the] Centre for Human Ecology, University of Edinburgh /

द्वारा Duffy, Tim
प्रकाशित 1988

Hands-on dBase IV (Version 1.1) : database management using dBASE IV (Version 1.1) /

द्वारा Duffy, Tim
प्रकाशित 1992