Martindale's "The Reference Desk" - Business, Math, Science, Engineering, Technology, Language, Medical, Veterinary, Livestock, Gardening, Photography, Music, Recipes, etc. Posted Monday, October 28, 2013 Visit Martindale's "The Reference Desk" - Business, Math, Science, Engineering, Technology, Language, Medical, Veterinary, Livestock, Gardening, Photography, Music, Recipes, etc.