516 APPENDIX 



nor have most sublines, but some of the ova- and ovary-transplant lines will be found. 

 Strains no longer in existence have not been listed, although some listed ones may also 

 be extinct. 



There is in preparation another bibliography, concerned only with genes in the 

 mouse. This grew out of Dr. G. D. Snell's private file of references, and is in process 

 of being put on its own form of Keysort cards. Additions to it are made from the 

 named-genes section of the larger bibliography. Whereas the larger one is of value 

 to all who work with mice, whether geneticists, pathologists, cancer researchers, 

 anatomists, clinicians, or animal breeders, the gene bibliography will exist primarily 

 to serve geneticists. Each gene and each linkage group can be sorted independently, 

 plus a wide range of subjects covering all phases of genetic investigation. 



Eventually, of course, the subject-strain bibliography will outgrow hand-sorted 

 cards, just as it will outgrow its one-man operation. The method is described here 

 because it is easily adapted for organization of bibliographic material in any laboratory. 



