La intervención del círculo de seguridadBert Powell, Glen Cooper, Kent Hoffman, Bob Marvin, Carlos Pitillas Salvá · First published 2019Open the Tome
Circle of Security InterventionBert Powell, Glen Cooper, Kent Hoffman, Bob Marvin, Zeanah, Charles H., Jr. · First published 2013Open the Tome
A review of ionospheric disturbances resulting from some naturally occurring eventsMarvin M Hoffman · First published 1979Open the Tome
The effects of training on the judgement of non-verbal behaviorMarvin Arthur Hoffman · First published 1965Open the Tome
