Sir,
1. I think you are working in any organisation in the area of Maharashtra. If so, the rules as framed by the said State Govt. under said Act will also be applicable for making compliance under said Act as mentioned by me earlier.
2. In my opinion, there is no utility of reading old and lengthy books on above subject because generally there are some amendments in the labour laws and the same are naturally not reflected in the old books. I will suggest you to please purchase a up-dated bare Act of the Maternity Benefit Act, 1961 alongwith Rules framed by the Maharashtra Govt.(if applicable in your case) and decide the issue accordingly.
3. As I understand, for entitlement, it is mentioned in the said Act "no woman shall be entitled to maternity benefit unless she has actually worked in an establishment of the emjployer from whom she claims maternity benefit, for a period of not less than eighty days in the tweleve months immediately preceding the date of her expected delivery (Section 5(2) :" There are some exceptions and explanations in said section which you may go through before deciding the issue. Earlier the eligibility conditions were "one hundred and sixty days", which have been amended in the year 1989.
4. The provision of medical allowance is mentioned in section 8 of said Act and the same as per my information is presently Rs.3500/- to be paid in certain conditions as mentioned in the said Act. I hope, you will take action as per provisions of the above Act and rules framed thereunder as applicable in your case.