An international reference work in twenty volumes including an index.

259327 - v. 1

259329 - v. 2

259330 – v. 3

259331 – v. 4

259332 – v. 5

259333 – v. 6

259334 – v. 7

259335 – v. 8

259336 – v. 9

259328 – v. 10

259337 – v. 11

259338 – v. 12

259339 – v. 13

259340 – v. 14

259341 – v. 15

259342 – v. 16

259346 – v. 17

259345 – v. 18

259344 – v. 19

259343 – Index