Friedman-Abeles Photograph Collection - NYPL Digital Collections"The collection contains work from the partnership of Leo and Sy Friedman and Joseph Abeles, together the pre-eminent firm documenting Broadway theater productions in the 1950s-1970s. The Friedman-Abeles Photographs consist primarily of photographs, negatives, contact sheets, proofs, slides, and oversized prints, spanning the partnership of Leo and Sy Friedman and Joseph Abeles..."