Bibliography of Gregory, G. A., by subject:

•	United States -- History -- Civil War, 1861-1865 -- Registers (1)
•	Forest products industry (1)
•	United States -- History -- Civil War, 1861-1865 -- Regimental histories (1)
•	Forests and forestry -- Economic aspects (1)
•	Petroleum engineering -- Congresses (1)
•	Queensland -- Social conditions -- 1976- Congresses (1)
•	Confederate States of America. -- Army. -- Virginia Infantry Regiment, 38th -- History (1)
•	Multiphase metering (1)
•	Gas fields -- Production methods -- Congresses (1)
•	Gas engineering -- Congresses (1)
•	Slug modelling (1)
•	Oil fields -- Production methods -- Congresses (1)
•	Flow (1)
•	Forest management (1)
•	Virginia -- History -- Civil War, 1861-1865 -- Regimental histories (1)
•	Social service, Rural -- Queensland -- Congresses (1)
•	Multiphase flow -- Congresses (1)
•	Virginia -- History -- Civil War, 1861-1865 -- Registers (1)