- on
February 10, 2022.
Retrieved February 10, 2022 – via newspapers.com.
Gelbtuch,
Howard (February 19, 1996). "The
ground floor: The
times they are a changin'...
-
number of
other companies, including: Pion Limited,
founded in 1959 by Adam
Gelbtuch and John Ashby, was the
publisher of four
journals in the
Environment and...
-
Archived from the
original on
January 18, 2018.
Retrieved February 15, 2022.
Gelbtuch,
Howard (February 19, 1996). "The
ground floor: The
times they are a changin'...
-
Archived from the
original on
February 15, 2022.
Retrieved February 11, 2022.
Gelbtuch,
Howard (February 19, 1996). "The
ground floor: The
times they are a changin'...
