1974 vi, 570 p., 2 figures, 29 plates, frontispiece, cloth (dust jacket). Library stamps, else a very good copy.
1979 xvi, 2735 p., portrait, 4to, cloth. Library stamps and some slight wear on outer ends spine, else a good set.
1958-1967 Two volumes. 305, 584 p., cloth. Library stamps, else good set. Ex library Dr. M.A. Lieftinck (with his signature).
1958-1967 Two parts in two. 303, 584 p., uniform light olive buckram with printed title on the spines. The main work was published in 1951 as Agricultural Supplement 2 and included references up to 1949, roughly. The first supplement lists all relevant publications from 1950-1956, and includes some taxonomical notes itself. the second supplement deals with new publications and researches from 1957 to 1963, in some sections even to 1964, and includes additions to distributions, hosts and prey, etc.. Library stamp on front paste-downs, otherwise good clean copies.
1951-1967 Three volumes in three. 2307 [1420, 303, 584] p., 1 map, publisher's printed buckram (main work and first supplement), contemporary cloth with gilt title (second supplement). A massive work underscoring the importance of the parasitic Hymenoptera to the agriculture of North America. A very good set.
1951 1420 p., 1 folded map, publisher's cloth. Library stamps and M.A. Lieftinck’s signature, first inner joint weak.A massive synoptical catalogue on Hymenoptera. The map shows the faunal zones of North America.
1958-1967 305, 584 p., cloth / paperbound. Library stamp.
1951 1420 p., 1 folded map, publisher's olive buckram. A massive synoptical catalogue on Hymenoptera. The map shows the faunal zones of North America. Library stamp on front pastedown, otherwise good.