German weapons production statistics

I was surfing the Internet and came across this spreadsheet of German weapons production numbers by the year and the month,http://orbat.com/site/sturmvogel/GermWeapProd.html . I thought it was pretty helpful to have all that in one place. Can anyone confirm its accuracy? Is there a better place on the web for this kind of data? What about a similar resource for Allied equipment, and also for German armor?