Select the correct statements

I) Monographs contain information on any one taxon

II) Keys serve as quick referral systems in taxonomical studies

III) Manuals are useful in providing information for identification of names of species found in an area

IV) The National Botanical Research Institute is located at Howrah

I) Monographs contain information on any one taxon.
  - This statement is correct. Monographs are comprehensive publications that focus on a single taxonomic group, providing detailed information about its species, classification, distribution, and other relevant data.

II) Keys serve as quick referral systems in taxonomical studies.
  - This statement is incorrect. Herbaria serves as a quick referral system. They play a crucial role in taxonomical studies and serve as a quick and reliable referral system for botanists and taxonomists. 

III) Manuals are useful in providing information for the identification of names of species found in an area.
  - This statement is correct. Manuals are often field guides or reference books that provide information on the identification of species found in a specific geographic area. They are useful for botanists, ecologists, and naturalists looking to identify plants within a particular region.

IV) The National Botanical Research Institute is located at Howrah.
  - This statement is incorrect. The National Botanical Research Institute (NBRI) is actually located in Lucknow, Uttar Pradesh, India, not in Howrah.

So, statements I and III are correct, while statements II and IV are incorrect.