1. Chickens and Eggs;National Agricultural Statistics Service,1994
2. Prevention and control of diseases in the hatchery;Funk,1955
3. Studies in incubator hygiene. I. Formalin fumigation;Graham;Poultry Sci.,1932
4. The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals;Budavari,1989
5. Experimental toxicology of formaldehyde;Bolt;J. Cancer Res. Clin. Oncol.,1987