. . "Collection of J. G. Van Niftrik, an activist in the Netherlands and Switzerland in the transfer of intelligence and the smuggle of underground people and Jews from the Netherlands to England during 1942-1945"@eng . "Collection of J. G. Van Niftrik, an activist in the Netherlands and Switzerland in the transfer of intelligence and the smuggle of underground people and Jews from the Netherlands to England during 1942-1945"@eng . .